congrats on the buy.. I too have a 03 boxster but i live in florida so i havnt seen snow for a little while now... I havnt tried pushing my car after its sat for a while, but i have let it sit for about a week and a half and have a plethora of white smoke come out the back..try it and c what happends
check out this link for mats
http://www.car-stuff.com/store/?N=11567+4294967264+1698+11920+9207