I just now installed the updated e000.rom file onto one of my MK2A players here, and it does not seem to have had any ill effects.

Here's a really easy way to install this on a Hijacked player:

ftp your.player.ip.addr
put e000.rom /proc/flash_0e000
site sync
quit

Note that the version number is still 1.04, even though the contents have changed. I verified correct programming by reading it back (from /proc/flash_0e000) and comparing with the original and uploaded ROM contents.

Cheers