You know, it really helps if you say what Operating System you are using!!!!!!!!!!!!!! This answer assumes Windows XP.
Go to Start, Printer & Faxes. Right click on the printer's icon and select Share.
Now on each computer that you wish to use it dot he same but select Add a Printer. Now use the Install Network Printer Wizard. Yo may need drivers for the printer handy for each of the PCs.
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September 2008