beats me.... never seen the process done myself... all i've seen my pomen did was take out the hub and knuckle, send it to engineering shop to change to your desired pcd...How do you mod the hub if the PCD is wrong?
so far i've never seen ppl converting to other pcd ever complaints afterwards
other way of doing it is to use 'pcd converter'... basically a wheel spacer but with different pcd at the rim's end. but i've never seen a well-made converter here in malaysia, always made the rim out of balance... plus most of the time it will accelerate bearing failure....