Have you tried installing the AIO printer as a network deviced in EACH computer? Each machine will access it through the network, but they each will have the necessary drivers, especially for scanning.
CorkyG - Tucson, AZ
"Ineptocracy- a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers." - Merritt Man, 2011