The fellows name is BeatMilk, he raised his Jetta some time ago, the process is rather simple. Take some Shocks and Struts from a B3 Passat 93-98, preferably a VR6 model, wagon. but any set from any Passat should work just fine. its a simple bolt off bolt on operation, takes less than 3 hours. so says beatmilk. I am looking for my shocks and strut set right now. I had found a complete set for 40 dollars, but they ended up selling off the whole Passat, in stay of parting it out. That should give your 4-6 inches of lift.
My plan is to lift mine, get some better tires, and weld on a Snorkel. Im going to use an aluminum drive shaft for the intake, its strong and i can get them for free. so its not a big deal, then i will just rock it into the side of the jetta, and seal up the old intake area.
These are just current plans i have, but i need to get it lifted first. I take my jetta onto lite trails now and then, so a little extra clearance would not hurt.