Is this the N52 engine? I did the outer gasket (between the oil filter housing and the oil cooler) myself and it was pretty easy. The inner one where the filter housing attaches to the head is a little tougher to get at but I think the key is getting an E10 swivel socket(?) that will allow you to remove the upper rear bolt without removing the intake manifold.

My oil filter housing leaked oil down the driver side of the engine and in to the alternator and caused that to fail.