wow ur pc is fine for now just upgrade the video card u fool lol. from what it looks like u have a dell lol. well just get 2 things 1. a new motherboard if its a dell. if its not a dell get some good cooling. then get like a 6800Ultra or something. that will hold u for a wile just get a pci-e board and ull be set for a long *** time and get a mobo with 4x dimm slots then u can add more memory or upgrade to ddr2 sometime. and u can overclock the chip u have no sense with the system you have to start over unless you really really want to. just get stuff that u can throw into the new computer that ur gonna build. like a pci-e card any of those will go into a new build and some ram. hard drive and **** no sense in building from scratch now.
Intel p4 HT 3.0GHz
1 16x Toshiba dvd burner
2 sticks of corsair ddr2 533mhz 512mb
GeForce Fx 6600GT