Sounddriver problems

I'm pretty new to this forum, and don't know if this is the right place to post this problem, but here goes:  
Awhile back, I had to delete alle the content on my computer and reinstall it. No problem there. The problem was, I no longer own the CD which contains my audio-driver, so I have no sound. I tried to download a sounddriver, but have so far been unsuccesfull. After A LOT of research, I have come to these conclusions: 
a) I use Windows XP and my soundcard is bound to my motherboard, which is a MSI KT6V 
b) In the manual, there is a picture of the install setup of the audio driver. In this setup the driver is called Realtek AC97 audio 4.82. I believe this is the driver I need to install.  
 
The problem is I can't find this version of realtek AC97, I can only find realtek AC97 A004 (I think), but even though it installs just fine, Windows will not recognise this driver, saying that the system is not compatable with the driver (code 10)  
Any sugesstions on what the to do, or where I can find this driver?

Moved to General Discussion, Bugs Board is for site bugs only.