As mentioned
here, critor has managed to obtain more information pertaining to the flashing of an OS to TI Nspire CAS+es. This is a major breakthrough, as it gives insight into the file system of the CAS+ prototypes. Right now, the command prompt style interface is being explored, and hopefully exploited. More work is being done as we speak, by critor, bsl, and Goplat, and if you have any suggestions, comment, or questions, don't hesitate to post.
A picture of one of the calculators in critor's "set up" can be found
here.