Windows 7 - Having problems With Sound on my Windows 7 + XP Dual Bo

Hi, i just made my computer Dual boot to either Windows 7 or XP (Windows 7 first install) and i havent had any problems with sound on Windows 7 but when i installed the same realtek Audio drivers for XP, XP version im not getting any sound i restarted my computer but i still have no sound i uninstalled the sound drivers and reinstalled them but still nothing when i go into Device manager im not getting an little Caution triangle saying that this hardware is missing a driver etc

Here is my DxDiag as you can see it says i have no sound card for some reason even thoe my sound works fine on Windows 7.

**Really sorry about the poor quality thread i hope its understandable atm its getting close to 3:30am and im a bit tired ;P**

XP isn't even detecting the sound card. Did you remember to install the motherboard drivers in XP before installing the sound drivers?

I found out that i cant install motherboard drivers for XP because it keeps poping up with a UAC error i think its because the installer thinks that the location it will install this stuff to is C: which is Windows 7 and i have closed XP off from Windows 7 if that makes sense.

If i switch the driver letters around Windows 7 to be E: and Windows XP to C: will that stuff anything up on Windows 7?