if you have done one in a A3 its exactly the same setup in the A2 and need the same tools. ive done countless clutch jobs in gas and diesel vw's that it usually takes 45 minutes to drop the tranny/clutch.
nope never had to, if your getting the diff housing caught on the mount/firewall area then turn the transmission counter clockwise and pull it straight off. some time it takes a bit of wrestling but ive never had to push the engine or anything, i just leave a jack under to support it.