Printer’s ip

Pls i need a soln, we were on a 10.0.x.x network, but the router’s image which was d gateway crashed, so i decided to use the WAP as gateway,now we’re on a 192.168.x.x network,but the printers are still on a 10.0.x.x network. NO one could print so i changed a printers addy to the 192.168 network thr telnet, now i cant even ping the printer not to talk of reverting to the old addy, wat do i do?