I have the same issue it seems as most here. Sonar X1 Expanded on Windows 7 64 bit with Dim Pro 1.5 and Rapture LE. Same problem where Rapture full. I performed the Regedit to Dimension Gro and ran just the Rapture vsti portion and it installed just fine. I then launched in Sonar X2, added the Registration number and I was off and playing.
Thanks for the idea lorneyb2