To do what with VCDS? you need an eeprom reader for the SKC, then use VCDS or any high level diagnostic tool that can access login and there you go. Be prepared to wait for the SKC for hrs if the dash is Motometer, havent heard anyone mention this here. VDO or Motometer clocks, both different in the way the seed key. Best its mentioned as you will sense failure with a Motometer but it can be done with time. Otherwise really clued up auto locksmiths have awesome transponder readers up to the end of Mk4, on Mk5 it all gets to another level of tricky.
Have fun
Cheers
Jmac