guide for doing pd 150 timing belt??

Hi guys, for a few months now my temperature needle has had a mind of its own doing what it wants whenever it wanted, got myself to the dealers for a new temperature sensor and went ahead and changed it.

Unfortunatley i lost quite a lot of coolant trying to remove the old "O" ring so had to refill the expansion bottle, since then (3 days ago) i have had nothing but problems with what i thought was air in the system.
System seems to self bleed with hot air coming through the heater and water re-entering the expansion bottle via the top pipe, ( not as fast flowing as my mates) however i have noticed that the lower radiator hose is no where near as hot as the top hose and when the car is driven under load the temp needle shoots up to 120 degrees.

I have read loads of threads saying this is classic water pump failure, it just seems too much of a coincidence considering there was nothing wrong before i lost the coolant.

I have decided to change the water pump and timing belt but won't be able to get it done till middle of next week when parts arrive, in the meantime i wondered if anybody knows of a how to guide to doing the timing belt? , ive found a few guides on the 1.8t but nothing for the pd 150, any help will be much appreciated

Cheers

viking you're a star

Just to let you know all went well and it was the water pump that had given up. couldn't manage to remove the engine mount either
cheers for the help

yes, changed the belt, tensioner, roller and water pump, took me around 4 hours includeing my dinner reckon i could do it in an hour now that i know what i'm doing