Hey ! 
I'm new to this overclocking buisness, didn't even know you can until a week ago..
I have a pretty strong computer now.. Pentium 4, Core Duo, 4GM Ram, Chipset P35, Windows XP and ofcourse a video card which is Nvidia Geforce 8600 GT (Gainward 8600 GT PCX 512 MB to be exact).
Thing is.. I thought I was buying a good enough card but I'm not happy with its performance due to the fact the PC is new and all.. and unfortunately I can't send it back and get the 8800 GT now..
I was thinking of maybe overclocking it...
1. Can I overclock it without harming it or shortening its "life"?
2. What program should I use and how would I go about overclocking it without harming it?
I don't have and probably can't get another cooling system for the card and I understand that's important..?
I'm working with graphics and really want my card to be stronger without harming it in any way... would also be nice to run Crysis on high settings instead of medium..
Thanks a lot !

I'm new to this overclocking buisness, didn't even know you can until a week ago..
I have a pretty strong computer now.. Pentium 4, Core Duo, 4GM Ram, Chipset P35, Windows XP and ofcourse a video card which is Nvidia Geforce 8600 GT (Gainward 8600 GT PCX 512 MB to be exact).
Thing is.. I thought I was buying a good enough card but I'm not happy with its performance due to the fact the PC is new and all.. and unfortunately I can't send it back and get the 8800 GT now..
I was thinking of maybe overclocking it...
1. Can I overclock it without harming it or shortening its "life"?
2. What program should I use and how would I go about overclocking it without harming it?
I don't have and probably can't get another cooling system for the card and I understand that's important..?
I'm working with graphics and really want my card to be stronger without harming it in any way... would also be nice to run Crysis on high settings instead of medium..

Thanks a lot !