DJL,
If you have a desktop and an empty Hard drive bay, you can have a hard drive dedicated to RealTrack/Drums only (not the program).
That way, you do not have to do a "massive" reinstall of "everything", just the programs BIAB/RB, which are not hefty at all. And when smaller updates to real tracks come out, you can point installation to that secondary drive to be up to date.

I hope veterans will correct me, if I am wrong.