If you have a TI-83, send HTKLLASM.83P to your calc.  If you have a TI-83+ or TI-84+, send htkllasm.8xp to your calc.

no one except you can be held responsible if you or your calc get messed up when using the program included in the zip file.

you don't have permission to reuse any part of the source code, so don't.  the program can be freely distributed though as long as it's not modified in any way.