How do I keep my MAC address after making a bridged connection?

[ShawnD1]

My ISP takes connections based on MAC address. To get a normal router to work properly, I need to tell it which MAC address to use. The problem I'm having with using my laptop as a wireless router is that it changes the MAC address when the wired and wireless connections are bridged. I can go into Device Manager and manually set a MAC address for either the wired or wireless connections, but it doesn't let me set the bridged connection's address, so the laptop has no connection to the internet while the connections are bridged.

How do I manually set the MAC address for a bridged connection?

edit: Windows Vista

 

[JackMDS]

You call the ISP and give them the new MAC address.