Hi,
I am surprised your shareport is working with the x64 system...usually, those are the ones that seem to conflict with shareport the most....
Not meaning to be a mojo-killer, but I would suggest you have a "Plan B" ready to go.... Printing on a network with a non-network printer is a hack to start with....and sadly it seems to go down from there....
Unless you don't mind sharing a printer from a pc and leaving that pc on all the time in case you might need to print....
SD1