Ayun! Sir, since nasa XP ung Printer mo and all is windows 7, try to enable the file and printer sharing sa pc na may windows XP and if lahat ng computers eh nasa same IP range, just go to the WINXP pc, open control panel, then go to Printers, then kapag nakita mo na ung printer, right-click
mo yun then select properties, then after nun click mo ung sharing tab, then enable the option share printer, then lagyan mo sya ng name. then click on apply and then OK
To add the printer naman sa mga clients, ensure mo na kabisado mo ung IP nung windows XP then after nun punta ka sa windows explorer wing windows 7 Machine, then sa address bar type mo eto
\\ip address of winxp pc\ then press mo enter, then after mo mapress enter, makikita mo na ung printer na nakashare, right-click mo un then select add
HTH