The Gold Top issue has some discussion here -
http://forum.cakewalk.com/FindPost/3214170 Your base DimPro expansions should have been picked up by sourcing the multisamples location from your registry.
See:
a. Where your DimPro multisamples directory is
b. Where RapPro is looking
...
from a Command Prompt - cmd.exe type:
a.
reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software\dp" /f multib.
reg query "HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software\Rapture Pro\2.0" /f multi and see what's returned - enroute to a solution.