delocking? it's either the complete removal of external handles/locks or just changing the handles for keyless ones.
eg, completely remove the mk4 rear hatch handle mechanism and badge. get a bodyshop to fill them in and paint, then use a solenoid operated release to 'pop' open the boot remotely.
second type thing is something like removing the front door handles from a mk2 and replacing the whole set up with Audi 80 keyless ones. The door handle can still be used but the locking is done from the remote central locking.
either way its more for looks than security...
jv