The equipment and software for mapping that VW ecu is very expensive and really not economical to buy yourself just for this one car !!!

As said, you need to take it to a specialist VW live mapper such as AMD, MSD etc

Otherwise, fit an aftermarket ecu depending on your chosen tuners choice as this will be cheaper and more accesable in the long run in my opinion.

There are some really good and cheap ecu's such as Omex, Megasquirt, Mtech etc....

In fact I think Mtech will fit and map a MS V4 ecu to your car all in for about £1000 and then anyone can update or map it after that with only a PC !!