[G4] Airport Express Issue

[russells at strodtbeck.org]

I have an Airport Express Wireless and need to connect to an ISP that requires the Mac Computer Mac Address of the 
Ethernet Card.

When I connect to a DSL connection that does not require it works find, but the ISP that I need to connect to requires the 
Mac Address of the Computer. 

I could have the Airport Express Mac Address registered with the ISP, but the limits flexibility should I want to use an 
another wireless device. Most Routers have a cloning feature that you can clone to computer's Mac Address.

I could put a hard wired router with the cloned address between the DSL Modem and the Airport Express unit, but that is 
un-necessary  hardware.

Is the anyway that the Mac address can be cloned into the Airport Express Unit? Any suggestion would be appreciated.