Theres an emulator called FBA-XXX which is around 20MB so i think that will have support for just about every arcade machine supported but i wouldnt know for sure as i never have tested fba-x or this fba-xxx. Both files can be found on the commenly knowen ftp for xbox binaries
Also i would like to take a sec to be serious if i may (& yes i may
That the ftp & the creators of the homebrew scene or doing this just to build up there skills & help the rest of the community
& let anyone use them without asking for a price.
There is certain sites i have seen that you must pay $40US to become a member & to reach a place they have all the binaries located.
I hate people that use homebrew as a way of making money as it hurts the homebrew realm of programmers when if they wanted to they could be not doing anything to teach them a leason but they do this cause of what i stated above in bold.