Hi,

if you aren’t running your OS and apps fully 64-bit in Snow Leopard, then yes you can run EZdrummer. I do it on my Mac:s with Logic, DP, Cubase and Pro Tools.
To me it sounds like you should try to find the EZdrummer expansion(s) -EZX- that fits your needs the most and then add MIDI packs, like the Monster MIDI packs or Songwriter’s.
You can still tweak some, should you wish to. There is the EZdrummer mixer and you can separate the microphones into separate Inputs in Logic for further tweaking.

Superior isn’t 64-bit on Mac either, the Mac platform hasn’t been mature enough yet, since there is only the host developed by Apple that has gone 64-bit so far.
64-bit plugins are being developed on Mac as well, it’s just that it takes more time, for obvious reasons.

Please feel free to ask more, should you have any further questions.

Best Regards,
John