Fresh, clean install, can I determine where to load (different drives)?

andykub
I would like to keep as much as possible off my system drive

 
Don't we all.
 
Sometimes you can choose, sometimes you can't.  Sometimes you can move things after the fact and edit the registry (but then have to redo it after the next update), sometimes you can't.  Or you can set up symbolic links so Sonar will be fooled into thinking things are where they should be when they're not, and this'll survive an update. 
 
This last option is probably the best, but I don't do it (yet) because my main system folders are already sym linked (that's how Windows does different languages) and don't want everything to go through chains of links (maybe that's not a problem ?).  Here's a post describing how.
 

To have maximum control when installing with the Command Center, on the settings page use the paths tab to change default paths and enable verbose mode on the options tab to display installer options. Access the settings page by clicking the gear in the upper right of the Command Center.

Not knowing anything about your setup, it is difficult to discuss directory junction specifics. The Command Center provides for a custom VST2 path. Moving VST3 files while supported by SONAR is contrary to the VST3 specification and my not work with other software.