How do I clone my modem?

[drewmerc]

Hello all,
I have a simple question really!
I have a Ambit 250 with a legitimate subscription.
I purchased on ebay a Ambit 256.
I wish to make a clone of my legit modem in case it fails one day as I don't wish to be without the internet for any length of time. I'm not interested in hacking the cable network or using it for any illegitimate purpose.
Is it just a question of loading Haxorware on to the 256 then changing the mac address to my legit 250 ? Or is there more to it ? Will my cable network throw me off if it detects Haxor ?
I'm on Virgin in the Uk.
Any help or advice would be appreciated.
Thanks all.

the question is simple but it's execution is incredibly complex, but let's hit some key points if your modem fails ring virgin they send the nearest van with a modem (longest i've waited for a modem is 4 hours when it's dead, no lights) haxor would only help in a dead modem situation it will not help in network failure(think about it modems don't break often)
putting haxor on a 256 requires an spi programmer/blackcat usb/usbjtag NT (see the recommended tools sticky)
you need more than just the mac in this day and age (you'd need the certs from the modem as well)
yes virgin can detect haxor but with brains it can be hidden (these methods are not published sorry you have to read a lot and work it out, not that hard but i would say that)

call the cable company and give them the mac, when the one your using goes dead.

not possible to do this in the uk, our system differs from the usa