Getting from T1 to T2, here is a lil' secret if you have no checked luggage:

As you exit your satellite, head into the tunnel as if you were going to Satellite 3. There, you'll see a door taking you down to tarmac level. There is a "tarmac" bus that will take you, via the taxiways, to Term. 2. You'll get off runway side at Term. 2 and you can clear customs/immigration there if you need to. It's fast and quite fun.