Look for Tim's (TJG) how-to he did on swapping the rad on his TDI - principle should be the same
think its in the maint and info section
I didn't ever do one, was in a rush to get the rad on. It's pretty simple though!
Remove bumper/lights/grill undo crash bar and supporting frame, drain rad with tank cap open using tap on passenger side of radiator, replace rad and reverse.