I've had a look at the game list (just add the option -listgames when starting PiMAME4ALL) and MKII, MKIII and Rampage World Tour are listed so should work. As you may or may not know, MAME often requires differing ROM revisions depending on its fork, so it may be the ROM's you have downloaded are either the WRONG revision or corrupted/bad dumps. Most ROM sites will also have the revision listed of the particular ROM file, below are the required/compatible ones for PiMAME4ALL.
Mortal Kombat II
rev L3.2 (European)
Mortal Kombat III
Rampage World Tour
With regards to the XIN-MO USB controller, if you look at previous discussion in the thread the author is aware of the issue and is attempting to address in a future revision.
Hope That Helps!
Update - I have just tested the games mentioned, I am experiencing the SAME issues. The terminal log indicates 'error process exit with status 1' or 'error process terminated with signal 11' on exit depending on the ROM. I seem to recall MKII worked on a previous revision of PiMAME4ALL, this is common with emulators, changes to the core program to fix one issue often causes problems with something unrelated. Perhaps if you could log this as a 'Issue' at the homepage the author (pudding aka squid) can address this in a future revision and/or offer an explanation as to what's causing it.
Homepage - http://code.google.com/p/mame4all-pi/issues/list