In general, bricking a Nspire calculator is quite hard
Since your calculator came with 3.2.4.1237 preinstalled, according to another post of yours, you cannot directly install any older version. Beyond that, what you can do with the calculator depends on the hardware revision:
* if the hardware revision is I or older, you could reflash the boot2, with extra, cheap equipment known as USB / RS232 TTL adapter, and then proceed to use, say, OS 3.1.0.392;
* if the hardware revision is J, K or higher, you're out of luck, at the time of this writing. Boot2 3.10.16 doesn't work on those calculators, it's no use reflashing it. The only thing you can do with these pieces of junk is transfer back the 3.2.4.1237 OS of reduced functionality.

It's been linked from TI-Planet for weeks

How many have actually hacked their CX as of now...?

Hello every one!

Here, Here..\m/ The Non-CAS info could be updated or worded with better terminology and links, but I got mine to work.
I have pictures, but I guess I don't have the post count to upload them as of yet.

My Calc. professor has not allowed calculators since Calc I, and all work has to be handwritten anyway. He's a hard ass about it, but I'm used to it. Plus I like saying "I can do Calc, with out a calc!"

My reason was to see if I could do it, (The coder/hacker in me) and to double check my work. However, there are more ways to state an answer than you can shake stick at sometimes. (In other words, even the calculator is useless sometimes, unless you can figure out how HP came up with the answer, or especially on certain functions dealing with jump point discontinuities, and other graphical anomalies most calculators can't see or do)

"I think I think; I think?"

The conversion is possible:

Conversion of an TInspire CX to an TInspire CX CAS

Program-Sources Download …
• (1) software „nLaunch“ from
http://tiplanet.org/forum/archives_voir.php?id=12105
• (2) software „TNOC“ from
http://tiplanet.org/forum/archives_voir.php?id=1922&short=1
• (3) of TInspireCX CAS-update from
http://education.ti.com/download/...
actual version: TI-NspireCXCAS-3.2.3.1233.tcc
• (4) of TInspire Link software from
http://education.ti.com/de/deutschland/software/details/en/.../ti-nspire_computerlink
actual ver.: TI-Nspire_Computer_Link_3.2.0.123.exe

Creation of necessary update
run TNOC_en.exe
• (1) choose „Open“ and put in path to TInspireCX CAS-update
• (2) activate checkbox „Delete boot2“
• (3) execute „Process“
• (4) result: in folder of original TInspireCX CAS-update-file (e.g. TI-NspireCXCAS-3.2.3.1233.tcc) now exists a new file with „originalname“_b.tcc (e.g. TI-NspireCXCAS-3.2.3.1233_b.tcc).
• (5) this file has to be renamed to „phoenix.tns“

Connect TInspire with PC
• (1) connect handheld with PC
• (2) create folder „nLaunch“ on handheld using TI Link-software
• (3) in the lower panel (TI-Nspire file browser) right-click, New Folder, "nLaunch"
• (4) copy file „phoenix.tns“ to folder „nLaunch“ on handheld
• (5) if exist: copy files „nLaunch.tns“ and „preloader.tns“ from PC-folder „nLaunch“ to handheld-folder „nLaunch“

Reboot to delete OS
• (1) reboot handheld: press reset-button at backside of device and at same time buttons „doc“ + „enter“ + „EE“
• (2) release reset-button
• (3) release three buttons
• (4) handheld reboots and stops with selection 1-4.
• (5) choose button 2: „Delete operating system“
• (6) confirm with button 1
• (7) handheld deletes OS and stops, showing: „Press any key to restart“
• ( execute restart („enter“), handheld stops, showing: „Operating System not found. Install OS now“

Installation of CAS
• (1) choose handheld in TInspire-Linksoftware at bottom right edge, (probably do „Aktualisieren“) and „Auswählen“:
• (2) choose „Extras“ at top, „Handheld-BS installieren“:
• (3) choose from PC-folder „nlaunch“ file „nLauch.tco“:
• (4) installation of new CAS-OS with „BS installieren“ and confirm „Ja“:
• (5) installation of new CAS-OS starts
• (6) PC shows „Fehler“: IGNORE ERROR MESSAGE !!!
• (7) The new CAS-operating system is installed correctly on TInspireCX (error message does not matter):

do setup
• do setup on handheld: choose „Language“ and „Size“ of writing

do CAS calculations
• do classical calculations, e.g.: factor, expand, integration

It keeps saving "phoenix" as .tcc not .tns . How do you change that?

Quote from: Tinker on September 06, 2013, 08:34:59 am

The conversion is possible:

Conversion of an TInspire CX to an TInspire CX CAS

Program-Sources Download …
• (1) software „nLaunch“ from
http://tiplanet.org/forum/archives_voir.php?id=12105
• (2) software „TNOC“ from
http://tiplanet.org/forum/archives_voir.php?id=1922&short=1
• (3) of TInspireCX CAS-update from
http://education.ti.com/download/...
actual version: TI-NspireCXCAS-3.2.3.1233.tcc
• (4) of TInspire Link software from
http://education.ti.com/de/deutschland/software/details/en/.../ti-nspire_computerlink
actual ver.: TI-Nspire_Computer_Link_3.2.0.123.exe

Creation of necessary update
run TNOC_en.exe
• (1) choose „Open“ and put in path to TInspireCX CAS-update
• (2) activate checkbox „Delete boot2“
• (3) execute „Process“
• (4) result: in folder of original TInspireCX CAS-update-file (e.g. TI-NspireCXCAS-3.2.3.1233.tcc) now exists a new file with „originalname“_b.tcc (e.g. TI-NspireCXCAS-3.2.3.1233_b.tcc).
• (5) this file has to be renamed to „phoenix.tns“

Connect TInspire with PC
• (1) connect handheld with PC
• (2) create folder „nLaunch“ on handheld using TI Link-software
• (3) in the lower panel (TI-Nspire file browser) right-click, New Folder, "nLaunch"
• (4) copy file „phoenix.tns“ to folder „nLaunch“ on handheld
• (5) if exist: copy files „nLaunch.tns“ and „preloader.tns“ from PC-folder „nLaunch“ to handheld-folder „nLaunch“

Reboot to delete OS
• (1) reboot handheld: press reset-button at backside of device and at same time buttons „doc“ + „enter“ + „EE“
• (2) release reset-button
• (3) release three buttons
• (4) handheld reboots and stops with selection 1-4.
• (5) choose button 2: „Delete operating system“
• (6) confirm with button 1
• (7) handheld deletes OS and stops, showing: „Press any key to restart“
• ( execute restart („enter“), handheld stops, showing: „Operating System not found. Install OS now“

Installation of CAS
• (1) choose handheld in TInspire-Linksoftware at bottom right edge, (probably do „Aktualisieren“) and „Auswählen“:
• (2) choose „Extras“ at top, „Handheld-BS installieren“:
• (3) choose from PC-folder „nlaunch“ file „nLauch.tco“:
• (4) installation of new CAS-OS with „BS installieren“ and confirm „Ja“:
• (5) installation of new CAS-OS starts
• (6) PC shows „Fehler“: IGNORE ERROR MESSAGE !!!
• (7) The new CAS-operating system is installed correctly on TInspireCX (error message does not matter):

do setup
• do setup on handheld: choose „Language“ and „Size“ of writing

do CAS calculations
• do classical calculations, e.g.: factor, expand, integration

It keeps saving "phoenix" as .tcc not .tns . How do you change that?

If I may AndrewSanghera, it may be as simple as turning on the file type naming feature for windows. It is off by default. Otherwise you are just naming it phonenix.tns.tcc. Which is halfway in the right direction. Correct me if I am wrong or misunderstood your question.
Hope that helps you.

Quick warning, DO NOT try this hack with a CX with 3.2.4.1237, for it bricks eternally and requires the calculator to be replaced altogether. :'(

if you are using windows you need to desactivate an option
very simple
http://www.programmerfish.com//wp-content/uploads/2009/10/Folder_Options_thumb1.png
http://www.programmerfish.com//wp-content/uploads/2009/10/Folder_Options2_thumb.png
http://www.programmerfish.com//wp-content/uploads/2009/10/image_thumb53.png
doing this you can see the extension of the file
phoenix.tns.tcc
and rename to
phoenix.tns
enter and now it is an .tns file

http://www.programmerfish.com/how-to-change-file-extension-in-windows-7/#.Umr4Lfmkr8A

You can't with 3.2.4 atm.