Umm, all files on the calc are .tns files
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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!