AOL's way of handling special background graphics, and file attachments, is to treat each as a separate file. Then it bundles them all up into one .mim file. It's up to you to decode it. You will find it in the Free Stuff section. Download the file named setupdx.exe .
Installation is as easy as double clicking on it.
The next time you are faced with a .mim file, download it with confidence. It won't clog your system. It is small and easy to install and use. Treat this window just like any other Windows folder. It's just the best way to organize those goodies you have been collecting over the years.