I’d never thought of this before! A wireless print server does normally have a wired ethernet port as well, so why couldn’t you configure the two ports, wireless and wired, in a bridge configuration?
Turns out even the stock firmware will do that. Page 16 in the manual for Linksys WPS54G describes using “infrastructure mode” to bridge two networks.
You would need to manually set the wired portion to the IP address you wanted, and make the wireless address static as well.
And you would need to set up a static route at the other end, on your router, to make sure it doesn’t try the bridged IP address out on the internet but instead at the wireless address.
Thanks for the idea, and good luck with implementation.