First let me explain what it is I want. I live in a biggish house and the signal doesn't reach from one end to the other. Unfortunately my rooms far enough that it has a bad signal 
I have a spare D-Link Dir 615 router and was wondering if it was possible to connect that router to the main router downstairs (its a virgin superhub I think) and then use that router to give my ps3 and computer wired connections as well as extending the wireless range? Is this possible and would the second router have to be wired into the main router or could it e wirelessly connected? Thanks for the help!

I have a spare D-Link Dir 615 router and was wondering if it was possible to connect that router to the main router downstairs (its a virgin superhub I think) and then use that router to give my ps3 and computer wired connections as well as extending the wireless range? Is this possible and would the second router have to be wired into the main router or could it e wirelessly connected? Thanks for the help!