J-Rad, I did the reservoir change on my 2000 a year ago tomorrow. It's not that much fun but definitely doable. I think I spent around 3-4 hours and around $220 or so for the new tank and coolant cap. Here is the write-up I used.
http://www.dietersmotorsports.com/tech/tech9-03-2003.htm
And you will most probably want to pick up something like this if you do it yourself. I bought mine at Sears.
I went ahead and did a mini write up with pics in this thread if you want to check it out.
http://www.986forum.com/forums/showthread.php?t=20261
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