Moving up to a larger harddrive

Does anyone have a script or iron clad step-by-step instructions how one can move their current installation from a smaller hard drive (80-GB in my case) to a larger hard drive (160-GB)? Tools provided by most hard drive manufactures allow this for ugh-Windows, but I don't know of any for SUSE Linux. During upgrades I always do a fresh install, so moving to a different drive is easy then, although time consuming. Cheers, Bo b