I've also heard to get a couple of extra bolts and cut the heads off and put them in on the corners as a guide so when you fit the pan back on you have it lined up just right and don't smear the sealant around.
This article shows where the prying points are.
I haven't done this particular job but I just had my boxster up on jack stands for the last few days and there was a decent amount of room, and I did it in my garage. You can jack the whole car with two lifts (one in the back, and then one lift from either side in the front, so if you are close to a wall you can lift from the other side) I got the jack and the stands from Harbor Freight (on sale of course
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If you get the LN plug (I have one) be sure to note the lower torque - it is hard to miss as they stick it on a label over the hex hole on the head.