mike_mccue
How do the 32 and 64 bit plugins show up in plugin lists?
Somebody recommended the following once, which makes your question irrelevant.
You probably do not want both 32-bit and 64-bit versions of most plugs anyway. So just install only the 64-bit versions. Should you actually want both, or if the installer gives you no choice, put the 32-bit versions in a directory (named, say, VST-32-bit-duplicates). Do not include that in Sonar's VST directory list, and you'll be in great shape. For me, the only VST I wanted both was IK ARC.
If I recall, 64-bit X2 does provide a indicator in the effects bin name list that indicates if it's using a 32-bit version. That clue, indicating Sonar was not using the version I thought it should be, was what prompted me to take the above action. Has worked like charm so far.