TCP ports for remote desktop printing?

["Dan Tesch" <dan.tesch () comcast net>]

I have a bunch of users connecting to a corporate LAN using
Remote Desktop to their XPPro workstations.  I have only
opened up port 3389 for them but now I have users that want
to print to their local printers from running programs on their
desktop in the office - this doesn't seem to be working and I
suspect that I need to open another port - does anyone know what
port number will allow this?  I don't have to open all of the MS
file sharing ports do I?

Thanks