If it's not included in the default developer image, it's probably not what Jazzwire's interested in. I think the idea of EmpegTaxi is for it to work without adding software to the player.

What other options are there for generating a checksum at the command line on the player?

sum, cksum... none of which is there by default. If idea is to command the player to send a FID, then I don't see what can we do (except to rely on heavy error checking transfer routine is supposedly doing). If, however, we can execute a script on empeg, then perhaps tar with one of compression options could do.

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green