Making seperate toolbars

After you open new toolbar in the Explorer window right click on any button and select TLB Settings. Open Toolbars tab and create new toolbar (you need create also new folder to store shortcuts there). Then select this new toolbar in the list and press Activate button. Now you have toolbar with its own folder and shortcuts. Create there drive space plugin.

One note. You cannot create plugin if toolbar is empty (right-click menu on empty space does not work in explorer window). But you can drag&drop any shortcut to this toolbar and right-click on button to create plugin button. When plugin will be on toolbar you can delete unneeded button.

Hope I've explained clear