The exact thing you are looking to do doesn't exist in ObjectDock Plus, but there is a similar feature that might just work for you.
-Right-click on your dock.
-Select Add -> New Custom 'Flyout Menu' (You may need to select the 'This Dock' item first)
-Select 'Custom menu:'
-Click Add -> New Shortcut
-Click 'Browse', and find the program you want to add.
-Name the entry, click 'Change Image' to assign an icon, and click OK.
-Add as many shortcuts as you want.
-Assign a name and an image to your Flyout menu, and click OK.
When you click the new icon, it will open up a rotating menu of all the shortcuts you added.
