Need a new sound card - PCI slot.

[SneakySnake]

Apparently, my computer didn't have a soundcard in it. The restore disks must of had some drivers for an integrated disk. I used to have a Sound Blaster Audigy 4 sound card, I always thought it was in my computer, but I guess I never put it in. I recently downgraded back to Windows XP, I couldn't get used to all the add-ons with windows vista/7.I believe I never put my sound card in because it never actually fit, and now I can't find it (it wasn't in my old PC either). So, im looking for a slim video card, and my budget is up to $150 CANADIAN. I got some pics of how little room I have.OLD CARD CD:Blurry specs:inside pc:
I could move down my video card, to make more room, if it doesn't fit.
UPDATE:I went hunting aroudn in my PC restore disks (factory reset), and found the driver files. My computer has a built in Realtek high Definition Audio Card. I don't know the exact model, but the setup says "Realtek High Defintion Audio Driver R1.72". If anybody can help me find a Windows XP Service Pack 2 (just updated) version of this, it would be appreciated.

[TheVirus]

http://www.newegg.com/Product/Produc...82E16829271001

That's what I use, quite an amazing card.