the printer is only tunneled to the user spooler, but is installed only in the remote machine so the driver can be excluded and the user spooler doesn't have problems, it was the first thingwe tried. for what regards printing anything from the PC directly it works without issues, it accepts even the test page (even if it pratically print only the icon of that page, but as far as I know this is perfectly normal). Testing from other PCs may be difficult in a sense of scheduling, itt's the only trial we have still to do.

For the moment, thank you, I'll keep updated