Is LLTD installed on the XP machine?
Did you try the old hook it up first to the XP machine trick?
Can you assure me that it's not accounts or firewall issues?
I have two pc's at home. My primary is a Vista 64bit PC with a Canon MP730 attached. That all works well. I also have an XP laptop. When I try to add the Canon MP730 as a network printer, I get a message saying a suitable driver could not be found. I have the MP730 setup as a shared printer and it does show up when you go thru the Add Printer screens. I also have the original MP730 setup disk for XP inserted in the laptop. I point it to the Drivers folder where there is a filed called mp50prn.inf. But It always says a suitable driver cannot be found.