i take it you were using the method described here:
http://blog.powershell.no/2009/11/08/deploying-printers-using-group-policy/Check out these instructions to see how to use GPP:
http://www.msserveradmin.com/the-one-reason-you-should-use-group-policy-preferences/GPP = Group Policy Preferences, an expansion of Group Policy
The Actions are how you control the printers on the machines (create, replace, update, delete)