Wireless PC connect to Wired LAN ?

Hi,
I have a Billion BiPAC 7402VGP modem/wireless router/switch/VOIP device wired to two PC's in this room, and another PC at the other end of the house connecting by wireless.
I have a spare wireless card,
I have a spare Dynalink RTA230 bridging modem/router with one LAN port and a USB port,
I have a crossover cable and a straight ethernet cable spare.
The two PC's in this room are networking fine thru the 7402VGP.
Is there a way to connect the Wireless PC in the other room to this wired network?
I want to be able to access the internet from each PC independently and share files across the LAN for all PC's. Ideally, the LAN will support gaming on all PC's, both on LAN and through the internet.
Is it possible?
Please don't answer if you don't have a clue, the internet is full of threads that end nowhere on this subject.
I have a Billion BiPAC 7402VGP modem/wireless router/switch/VOIP device wired to two PC's in this room, and another PC at the other end of the house connecting by wireless.
I have a spare wireless card,
I have a spare Dynalink RTA230 bridging modem/router with one LAN port and a USB port,
I have a crossover cable and a straight ethernet cable spare.
The two PC's in this room are networking fine thru the 7402VGP.
Is there a way to connect the Wireless PC in the other room to this wired network?
I want to be able to access the internet from each PC independently and share files across the LAN for all PC's. Ideally, the LAN will support gaming on all PC's, both on LAN and through the internet.
Is it possible?
Please don't answer if you don't have a clue, the internet is full of threads that end nowhere on this subject.