Did you dissable to DHCP function on the wireless router. This way the addressing wil come from the cisco router instead...
When you said that you were getting IPs of 192.168.0.XXX, was that on the wireless clients or the wired into the cisco?
REMEMBER to reserve the IP address of the wireless router onthe cisco... or things will get interneting
Another option, coming to think abt it is, have a wireless card in one computer, and bridge the wireless and wired together through that comp. This might work, but I do not know enough about the functons of the bridging (i.e. if it replicates the data packet for packet, or not as the case might be)
But, at ythe end of hte day... yes an access point would be the easiest