yes I know they will provide the ADSL router, but it will be downstairs by the TV, if I can configure my own router upstairs to receive the wireless signal from the QTEL router then won't it boost the range and allow me to plug in my non wireless devices upstairs?

What do QTEL do if you want 2 TV connections?, its an option on the application form, I think you have to pay more, do they install a second router or run a cable through the walls?