Seeing as how you're going from AMD to Intel it will be your chipset, lan, onboard sound if you're using that, it's not as critical as you may think it's one thing Vista was good about.
After removing the drivers that you can remove do not allow a restart, shutdown the computer and change the motherboard, boot up the machine with the motherboard installation disk in the optical drive, normally it will take a long time to come up be patient, you should be seeing your optical drives activity light flashing and your HDD led flashing.
Note: the only problem you may encounter is if there's anything on the motherboard installation disk that self boots, like memtest or a disk creator etc., in that case boot and once past that disk self boot capability insert the motherboard installation disk.
Otherwise Vista will automatically replace the needed drivers for the new motherboard and you'll be good to go when you get to the desktop, it may not install the onboard sound so check what has been successfully installed in device manager, any yellow or red indicators and install that specifically manually.
It may require reactivation if it is OEM, but Microsoft is very lax when it comes to Vista, it may auto reactivate online take that option if you need to but refuse to reactivate until the lan drivers are installed and you know you have internet access.
If you have to use the telephone option, which they will normally ask you, how many machines is this license installed on answer 1, are you reinstalling because of a hardware replacement, obviously yes. Do not volunteer information! Just answer the questions.
If you have any other questions PM me. Ryan