Allthough I haven't tried it, in theory it should work to run Window Manager simultaneously, if it's configured to ignore folder windows (found as 'CabinetWClass'). It does NOT manage window size/positions of regular applications, if you want that, other apps like Window Manager do it. It has a couple of additional features too, and hopefully some more later on. This is an app to make win7 explorer folder windows remember their size and position.

WindowManager even allows you to lock the position and size of any window, so that it will always open at the same spot no matter where you move it. This is where WindowManager steps in and makes sure your windows are placed exactly where you want them every time you open them. Many programs don't remember their position and size between sessions and even Windows Explorer does not restore windows to their last position under Windows 7 or higher. WindowManager helps you to improve your work flow by remembering and restoring the position and size of your programs and windows.

After a quick google search, I have found the following solutions:

Desksoft windowmanager