I think you can just move the steamApps folder (have a google). The problem is, that means all you steam games. My steam folder is about 170 gig, so I can't put that on an SSD. Once I get my SSD I might just rename my steamApps folder 'backupSteamApps' and copy just a couple of games to the SSD. Play those, then copy them back, keeping just a few at a time on the SSD.
Any ideas if that's a solution or won't work?
Use GameSaveManager or SteamMover to move the games you want on your SSD.