wireless + wired network routing

hello folks,

i have a desktop pc running XP-pro, whose ethernet pci card shares a router
(and a printer hooked up to the router) with 3 other computers. It's nice,
because the older router - with it's parallel printer port - gives me an
easy way to share my (also old!) laserjet printer with my other pc's.

i moved my pc upstairs, can't reach the modem with "wire", so got a wireless
USB adapter, which is fine for the internet, but for some reason, now that
i'm not getting my internet thru the "old, wired" router, I have to actually
disable it in the control panel network setup, in order for my wireless USB
to function as an internet connection.

so, every time I have to print, i have to disable the wireless network
adapter, enable the ethernet card, ya-da, ya-da.

Is there any way I could tweak the OS to "recognize" the wireless as
internet host, and the wired as printer host so I can leave them both turned
on?

the "wired" printer is shared, on 192.168.2.1, "select device port" is LPT1
the ethernet is labeled "Local Area Connection" and has all the usual items
(Client for MS networks, TCP/IP etc) installed.

thanks for any advice or suggestions.

Dave