Umm, all files on the calc are .tns files
they may not follow the .tns guideline, but even your gameboy roms from gbc4nspire are .tns files.
Argh page turn fail.
What I'd really love is mimas-style asm programming on-calc. that would totally rock, especially since a ram clear doesn't affect you in the slightest! A crashing program can have literally no effect on the others, since everything is basically in the archive!