Who has replaced their oil pan gasket?

I have a 2003 530i Manual Transmission w/Premium and Sport Pkg with 130,000 miles.

I recently noticed a couple of spots of oil on the driveway. After cleaning the underside of the engine and transmission, I drove the car for an hour or two and then let it sit overnight. Next morning I jacked her up and noticed an area approx 4-5 inches long on the passenger side of the oil pan that looked like it was seeping oil. I checked the torque on the pan bolts, they were all tight at 9-10 lb-ft.
How big of a pain is the pan gasket to change? The Bentley manual description is very invasive (unbolt and lift the engine 1/4").

I'd appreciate some "first-hand" advice from someone who has done this.

Thanks!