Changing my oil pan gasket was one of my first "mods". I performed it myself about 2 years ago with some of the buddies. With my limited mechanical experience it was a real pita but I got through it.
One bit of advice I got from a mechanic was to put gasket sealant on bottom of the block and stick the gasket to that. This helped in not having to worry about correctly lining up the gasket and the pan since it was held in place.
I had an engine lift and we disconnected the coolant lines, intake, and engine mounts to properly lift the engine w/out damaging anything. All in all the procedure took us about a day to perform (would have been far less but conversations, side projects, and beer tended to keep us from concentrating on the task at hand)
If you can tab the kdp, this project will be time consuming but not tough. Good luck!!