Deploying SCCM 2007 clients via GPO.

1. Import the Configuration Manager 2007 Group Policy ADM template
Start Group Policy Management
Create a new Group Policy Object called SCCM Installation Policy
Edit SCCM Installation Policy and import ConfigMgr2007Installation.adm
(ConfigMgr2007Installation.adm template you can find in folder TOOLS\ConfigMgrADMTemplates\)

2. Configure Configuration Manager 2007 Group Policy
In the Group Policy Object Editor, browse to the Configuration Manager 2007 Client policy. Double-click to open the Configure Configuration Manager 2007 Client Deployment Settings policy.
Enable the policy and then in the CCMSetup field, enter SMSSITECODE= SMSSLP=SCCMserver FSP=SCCMserver
Add a new package in the Software Installation section of the Group Policy Object Editor.
Browse to \\SCCMserver\CCMSetup
Select ccmsetup.msi and verify that Assigned is selected.
In the Group Policy Management console, link the SCCM Installation Policy to the OU.
Open Active Directory User and Computers and move ??ocomputers??? to proper OU.