Okay, so on your MacBook open up Terminal. Type in this:
defaults write com.apple.dashboard devmode YES
Now log out and log back in again. Once you log back in, you should be able to bring up Dashboard, and then while you are dragging a widget around, hit F12 to close dashboard, and you should still be dragging that single widget around, and it will stay on your desktop, even when the rest of Dashboard is gone.