[husker boxster]

They generally don't recommend having the rear wheels in the dolly as you could get a crabbing or dog tracking issue with the front wheels. But having the fronts in the dolly gets complicated because you don't want to just put the trans in neutral and run the rear wheels in free wheeling mode. More knowledgeable mechanics can chime in, but it's not good on the transaxle to do that, esp if it's a tiptronic. You'd need to remove the half shafts. The safest / easiest method is what Jay suggested - 4 whl trailer.