That ought to work just fine. Did you download the DMG from v002.info ? It decompressed, verified and opened ok? I’ve used the 8600 GT with those models with the Rutt (a friend has one), so im pretty sure it works.
You can try the beta of version 3.0 at:
http://v002.info/downloads/beta/ (its just the plugin, and that plugin is actually unique, you can have both 2.0 and 3.0 installed, and they both show up “uniquely”, so the search the path library and try to find v002 Rutt Etra 3.0.
Thanks, curious the issue is.