I guess you have already done this job by now but I thought I would post my experiences here for anyone else looking to do this instead of starting a new thread.
I have a 55 plate Mk2 with the metal "canister" style fuel filter.
I too was skeptical about getting my car started again but I managed to start it first time doing the following:
I bought the following priming pump (http://www.amazon.co...raper hand pump) - Be aware you need use the pump in the vertical postision with the arrow pointing up as it has a valve in it which works with gravity. Also the tubes fit onto the filter nicely.
Firstly I got the engine warm as it makes it easier to start.
Then I went about swapping the filter... After putting the new filter in place I put the inlet pipe on the filter, then connected the hand pump to the outlet of the new filter. I pumped until the hand pump and tubes for the hand pump were full of diesel and let some run out to a container, so I knew the filter was full.
Then I carefully diconnected the hand pump from the filter and quickly put the outlet pipe back on. And that was it, it started first time with no problems and it was a pretty easy job.