I agree with Sir Daniel here.
I'd never swap out a mobo and then hope it would be fine.
New Mobo is reinstall with me.
Everybody always complained about vista, it ran fine with me, just like XP, Win95 and now Windows 7.
Maybe if you get stuck with the 3DS plugin installers, give me a call, maybe i can help.
But first make sure you do a clean reinstall (will make your system much more stable!) instead of swapping out boards and "hoping Windows is intelligent and sort it out for ya", it doesn't !
After reinstalling on a fresh disk connect the old boot disk and copy the stuff over you need. Then when everything works use that acronis you found to make you a brand spanking new image and store that on another drive and/or on another external disk.
Now when you run into problems in the future, just load up the bootable cd you can make with acronis and place the stuff back.
If you make such a backup every month with acronis you can always go back quickly to a working situation.
Hiren's Boot CD is also a nice bootable cd with tools....
Make sure you find the "good" one....
I didn't fail !
I just found out 10,000 ways that didn't work.