Can I use a Wanadoo LiveBox with a different provider?

Since Orange took over from Wanadoo, I found my monthly bills soar from
c£20 - c£25. So I'd like to part company with Orange and get a
cheaper provider like Tesco for around £13pm.

The Tesco deal is just straight broadband (not wireless) so the
question is, could I just the plug the Tesco feed into the livebox and
continue operating wireless as normal?

Any tried the livebox out on non-Wanadoo/Orange connections?

Regards,

Duncan.