Will this card work with my computer? Please help!

You haven't given any specs of your system. If you've got PCI Express slot on your mobo and a half decent power supply, with a 6Pin power lead (which this card needs), then it will work. But it really does depend on how much memory, and what CPU you have in your PC, as to how well this card performs in games.
 
I did, I went to dxdiag, hit run, then clicked "save all info". Then I put it into a notebook file, and cut/pasted it. It still doesn't show 🙁
 
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System Information
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Time of this report: 4/22/2009, 07:40:42
Machine name: PATRICK-PC
Operating System: Windows Vista™ Home Premium (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.090302-1506)
Language: English (Regional Setting: English)
System Manufacturer: HP-Pavilion
System Model: KJ387AA-ABA a6403w
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: Intel(R) Pentium(R) Dual CPU E2160 @ 1.80GHz (2 CPUs), ~1.8GHz
Memory: 2046MB RAM
Page File: 1539MB used, 2794MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6001.18000 32bit Unicode