I believe that RPro reads
HKEY_LOCAL_MACHINE\SOFTWARE\Cakewalk Music Software using
ContentDir as the parent directory for the "Rapture Pro" folder and "SampleDataDir" as the parent directory for the "Cakewalk Sample Data" folder.
The "Rapture Pro" folder contains EQ, Elements, Logs, MIDI, Programs, Sample Pool and SQ folders. It also contains some xml files in the root for program management.
The "Cakewalk Sample Data" folder contains a "Rapture Pro" folder. In this "Rapture Pro" folder are the LFo Waveforms, Multisamples and Tunigs folders.