Using Ghost It

Ghost It is really easy to use once you have your images sized properly.

Run Ghost it.
Bring up the window with your image in it.
Right click on the ghost on the right side of the taskbar and click Ghost.
Click on the window with your image in it to make it transparent.
To adjust the transparency levels and other options right click on the ghost and select Configure.
When you want to un-ghost something just right click on the ghost and select Un-Ghost, then click on the window you want to un-ghost.
When you are finished, right click on the ghost and select exit.