You can create a computer group first, then add computers to the group.
To create a computer group
In the Scope pane, expand the server name.
Right-click Computers and choose Create Group.
In the New Computer Group dialog box, type the name (required) and description (optional) of the new group in the appropriate fields.
Click OK.
The computer group name is added to the Configuration Server.
To populate a computer group
Click All Computers.
In the Result pane, select the computers that you want to add to the computer group.
Drag the selected computers to the computer group in the Scope pane.
The computers are added to the computer group.
See also...