Yes, I can confirm that it can be done.
My B5.5 hatch acts just like another door - unlocks with the fob, locks with the fob. I never use the hatch pull in the drivers door any more - I just walk around back and lift the hatch while depressing the soft button.
As stated above, wingnut can do it - he has done a couple of cars for me now, in addition to activating the remote window up/down feature from the keyfob.
Both require re-flashing the comfort module, and the program to do it is indeed VDS-pro. There are a couple folks here in Ontario who have the setup - I'll let Wingnut chime in, but I recall he went through a few "legacy" laptops before he found one that had the right communication rate to work with VDS pro - newer laptops had too high a baud rate and would not connect.