MAC Address Cloning

I googled and did my due diligence looking for this answer, but I can't seem to find the one I like 😉 I am a grad student on a rather draconian network that lets you have ONE MAC address registered to your name. I have my wired ethernet MAC address registered. I would like to use my airport express to have wireless in my room and kitchen, but I can't seem to get the Airport Express to clone my MAC address. In my past experience this is a fairly standard feature of a router. Is it doable on the Airport Express?

Cheers!