To SirCrpwn when u get this: I get Err: Could not Initialize USB device when i attempt to dump the ROM with TILP MAC. Also, my calc refuses to accept the replacement OS. It says Err: Please turn calc off. Then turn back on (or something like that) when its done, the 2.40 is still there. I sent a support ticket to TI-cares and even they were boggled by this.
But my calc still accepts non OS data. So, if we can get a hold of Mapar007's source perhaps we can write a counterpatch? Would that work?