SCCM 2007 R3 New DP , how to add to all existing packages

Hi

Is there a script which allows an SCCM 2007 R3 DP to be automatically added as a DP for all existing packages? I know this is easily done in 2012 with Powershell support or DP Groups, but was wondering how to automatically add a DP to all existing packages in SCCM 2007 R3

Any help greatly appreciated!

Thanks

Max