Hi John,
Give your self plenty of time to fit clutch its a right pain in the arse,
rearsub frame comes off, airbox, battery and fuse box, rear mud guard and light unit, rear wheel, exhaust, the gearbox and final drive can remain as one item but be careful removing from engine as clutch push rod can be easly bent, this I learn to my cost went trying to do it on me jack jones, get another set of hands to help to remove and refit other than that its straight foward, if working on a r1100gs and the clutch push rod is bent the replacement rod will be different from the orginal brass rod the new one will be all steel with a small grove about 4" from the rear where a piece of felt is fitted to stop oil from gearbox getting to clutch. Are you sure your abs unit needs replaced?
regards
Jose el celta