All good replies....
It's definitely an easy job but there is of course the concern with snapping one of the bolts on your manifod or piping. I wouldn't be too worried about getting the pan off but the exhaust is another story. When I removed the rear section of my exhaust (rear wheel back) one of the spring bolts snapped off.
Really all you have to do is get the manifold heat shield off then remove the bolts holding your down pipe to the manifold and let your exhaust hang while you remove the pan. I would suggest gently trying to remove these bolts. If they don't free up with little effort and you're afraid their going to snap then throw in the towel, put your manifold heat shield back on and drop the change to have someone do it for you. It doesn't hurt to try... just don't force anything, that's when you'll end up breaking something.
Otherwise the bolts should come out fairly easy... maybe try using some of that spray stuff that frees seized nuts and bolts if you think their stuck.