Prepare for un-install of old mobo.
1: Uninstall your video / soundcard drivers
2: Replace your SATA / IDE drivers with the default Xp ones.
Go To Control Panel + System + Device Manager +IDE ATA / Atapi Controllers.
Right click on each entry and choose Update Driver + Install From List + "Don't Search, I will choose a driver...." and then select Standard Dual Channel PCI-IDE Controller.
3: Now, you can "reset" device manager, so it will detect new hardware from scratch just like it did the first time you built your pc....it will detect your new mobo as if you just installed windows....to do this....
a: Insert your XP cd.
b: Use windows explorer to find the SUPPORT/TOOLS directory and locate the deploy.cab file.
c: Right click on the deploy.cab file and select explore to open it.
d: Copy sysprep.exe and setupcl.exe to your desktop.
4: Now double click sysprep.exe and then hit the ok button.
On the next screen , just ignore all text and simply click Reseal.
This application completely wipes the rest of Windows records from the hardware in your pc, forcing redetection of all hardware the next time you reboot.
5: shutdown your pc and remove old mobo.
6: install the new mobo and upon reboot windows will detect your new mobo and there will be no "old hardware driver" issues.
NOTE: YOU WILL HAVE TO RE-ACTIVATE WINDOWS AFTER USING THE sysprep.exe COMMAND!