Hey Johnny,
Looks like you are getting in, as most people are getting out!
I had a 16V MK3 before my mk5 GTI, big difference, though I do sometimes miss how the MK3 handled like a go kart!
As for remaps, not too sure, know the GTI ones, but not sure if the TDI would be through the same companies,know that Revo are one of the main ones in the UK.