Re:As a general rule (Score 2, Informative)

You are correct, most are BIOS replacements...

...which is why most sellers are selling blank chips and programmers. Users are expected to go out and find something to flash on the chip. Of course anyone who can find game disk images to burn will have little trouble finding a bios to flash on their mod.

I do not know if Lik-Sang was following this practice or not. This easy programmability will certainly make it more difficult for MS to write checks in future releases that stop games from running on modded consoles, however.