I've looked into it for mine and you get very little gain for any money spent on a non-turbo car,although as your engine is more or less exactly the same as fitted to mk.3 GTI's then all it's tuning parts will be applicable I guess.
It would be cheaper to sell it and get a petrol or diesel turbo than it would be to tune yours and still end up with less power.
Chris.

DLS Iridium 8.3,Vibe Space 12 V3,Vibe Bass 4,Vibe Stereo 2,Vibe Stereo 4,17in RS4 reps,lowered 35mm + 50% tints.
Coming soon...Image Dynamics CD2 horn loaded compression drivers (oooh get me!)