Errr, great....
BUT, it would of been nice to see a VWNavi reference in the above post. Especially the VWNavi member CamelUK who alongside myself and a couple of other members have spent a long time researching this. CamelUK has also wasted a fair bit of cash on VW parts.
Please give credit where its due.
There is a guide which CamelUK has made and a topic on VWNavi thats 18 pages long. The guide has all the parts you need and a how to with picture. If someone pm's me I will send the link or email you it. This is only because his website may be overloaded if I just post the link.