Hi,
The only way my ISP (DSL extreme) will give me a new IP address is by changing the MAC address on my router (Netgear WPN824).

So i was wondering if there is a script i can insert in JD that will randomly generate a MAC address on the router for reconnection?

thanks

A random MAC address isn't needed. A script that changes the MAC address is sufficient.

Please, read about drbit's trick in "Random values at MAC spoofing on LiveHeader".