hmmm...i dunno. its real confusing, trwin has high compatibility, but i guess its not really used that much (although i used to use more than anything else). i reckon u should arrange it as zilmar-spec emus (cos then people will recognise that theres something in common with them...a lot of newbies, dont realise that u can put jabo's plugin in 1964). then something like 'others'.
actually more like this:
'Zilmar-Spec' Emus:
Class A
-1964
-Project64
Class B
-Apollo
-Daedalus
'Others':
Class A
-Corn
-Nemu
-Uhle
Class B
-TRWIN
I dunno, otherwise it sorta runs too much into opinion, i dunno, wateva, just a though.