a) Thank you so much for posting the EU version of Dark Legacy - that was one of two on my missing but dearly wanted list. A fine Hanukkah present. Since they don't have a copy, would you be opposed to me submitting that to Vimm's lair? If not, I understand, but I wanted to contribute to them. I won't do it without your permission.
b) I do have one more game that's even more dear to me than Dark Legacy - ToeJam & Earl 3: Mission to Earth's EU version. The English-only version runs very well and the EU one may not yet be fully compatible, but that's my favourite XBox game. I converted a raw redump of that using XDVD Mulleter and it worked partially, but not completely. I'm not sure if it's my fault or an incompatability that hasn't been addressed yet, but it seems odd that the NA version would run well but the EU version, which is the same but with multilanguage support, wouldn't. I have EU version of many other games that work just as well as their North American counterparts.
That said, if you know of another, better way to convert raw .iso files, I'm all ears. I couldn't get any XBox games to run on xemu for the longest time until I realised that it was a disc format issue, not an error on my part or that of the developers.
c) I found the 'World' version of Mechassault 2 elsewhere, but it crashes upon loading or soon thereafter. Again, probably a comptability issue. I will try the version that you just posted and report back.
I tested both 'World' versions of MechAssault 2 - the one you just posted and the one that I found on Vimm's. Both are the same size on disc and both always crash in the same spot on loading. I assume that Xemu simply isn't comptabile yet.