Hold on a second - you can control the installation paths during installation. I save the programs ONLY on my primary drive (C:), and I direct all samples and such to a secondary drive (D:). So my Perfect Space content, my Session Drummer content, and that sort of thing are on my secondary hard drive - and this was specified during that install process.
You can also move things around after the initial installation, you just have to go back into Sonar Preferences (X1 or X2) and go to the Folder Locations dialog box and tell Sonar where you moved things to. But if you managed the paths during the installation, you should not need to do this step.
Bob Bone