If they are standard VW ones you either have to smash or melt the plastic part to get the lenses off. The sealent that VW use will absolutely not soften with heat. I went through several sets of lamps when I was doing mine before I worked it out. You will need 2 sets of lamps.

130pd, 5dr, winterpack, leather, cruise control, revo map, miltek decat, k&n panel, Jamex coilovers, 18" BBS LM reps (9" rears) 312s, joey lamps, Ipod, bluetooth, 2 x 6.5" component sets 3 amps+ stuff I've not fitted yet.