Update 27-12-2009:Turned the beetle around so I can work on the rear brakes.
First I loosened the wheel nuts, and the axle nut.
Then I put the car on axle stands, and removed the wheel and the drum.
After that I removed the brake shoes and the brake backing plate.
Of course I did all this to the other side too..
Now I could test-fit the caliper bracket.
Fits nice! Now I have to get the drums machined and get some passat caliper holders.