Can i install only the Update from Riderunner over my Roadrunner Program from November ´08?

Or is it better, to use the Full Install from Riderunner?

(Difference between the InstallFolders - as Update and as Full Install over Roadrunner Program "\Roadrunner", and as Full New Install "\Riderunner")

And, are in the Update all Command Update´s since November ´08?