Fareastdriver.
Can't say for certain, but you MIGHT be able to use one of the modem/routers as a wireless repeater/extender. I've done that in the past with a USRobotics wireless router (with a Belkin ADSL2 wireless router being the one connected to the phone line and interweb), there should normally be some sort of an option in the router configuration pages to allow you to "bridge" the two.
I could look for you if you want, just post the makes/models and I'll see what I can come up with.