Yes, all games work when I launch directly from RA. Just verified, I only had the FBAlpha core downloaded. Didn't realize the FBNeo core existed - just tried it now, and it also doesn't work with my Neo CD games (does launch AES/MSV just fine, though). Also, the FBNeo core won't load my Neo CD games directly in RA, but the FBAlpha core does without issue.
I don't need any specific parameters to make this work, do I?