I think you should be fine, because I am sure if it comes out on ticalc.org people here will recognize the code if they saw it here before. See Hyped, for example, on Cemetech. The community easily spotted the program that were stolen, even if they never used them before. That said, there's a lot of traffic over here, though, so if you ever put your code on pastebin.com, make sure to mention here that you did post it.

Ah cool, you might find some additional help there too.

Nice to see this progressing. Hope you figure everything out soon

I have been working on something like this in java. The checksum is the lsb of the sum of all the bytes in the data section of the file. (I'll use "c" at the end of a num to represent that it must be converted to a char) The header of the whole file is **TI83F* 16c 10c 0c (42 nulls) (2-byte length of data section). I got this from the tixx_something guide on ticalc. Search tixx.