$ 4 got me a "6 Wrenches in 1" Oil Filter Socket (Wal-Mart) that has worked great for several years on the Boxster. A former post detailing the equipment and supplies is at
http://986forum.com/forums/showthread.php?p=5144#post5144 .
Learned from recent hard experience: make sure your oil drain pan has a screen that will prevent the Box's drain plug from blocking the drain. Mine fell straight on top of the hole and turned out to be the *perfect* size to plug it, causing a mini-superfund site in my garage. I didn't want to dig for it in the hot oil but ended up having to! Secure some "hardware cloth" or similar large screening over the opening to prevent a similar fun time for you...