64 bit Windows will have two separate folder structures...
C:\Program files - for 64 bit programs
C:\Program files (x86) for 32 bit programs
For VST Purposes there will be several options..these are the Cakewalk options
C:\Program Files\Cakewalk\Vstplugins - 64 bit
C:\Program Files (x86)\Cakewalk\Vstplugins - 32 bit
Placing\Installing the DLL's in the 32 bit folder would be the best place to put them so that
they can be appropriately categorized by Sonar...
Cheers!