Okay so after hours and hours searching all over the google webs for a solution on how to change my MAC address in Windows Vista with an Intel WiFi Link 5100 AGN card, I finally found the answer. I'm posting it here because hopefully someone will see this and it will work for them.
The answer was quite simple actually, the instructions are here, but they miss a few key things. First, when you create the registry entry, make sure to put the - in the MAC address like so 00-00-00-00-00-00 instead of 000000000000. Secondly, I had to make sure the first part of the MAC address was 02-00-xx-xx-xx-xx. After that, I disabled and enabled my NIC and voila it finally works.
Tell me something real
)