As some of you know Adobe doesn’t use built API for an “Open Window” on the PC. In Windows 7 there is a new feature called Aero Snap. Unfortunately because adobe wanted the CS4 suite to look the same on the PC and Mac the Snap Feature does not work out of the box. I will explain to you how to get Aero Snap working with all of the Adobe CS4 Applications like Photoshop Cs4, Illustrator CS4 and Dreamweaver CS4.
The only way I can get Aero Snap to work on Adobe CS4 is to use the shortcut key. There might be at some point an update from Adobe to correct this issue but I am not holding my breath. Again this is not a Windows 7 issue. This is an Adobe Issue.
You can find Windows 7 Aero Snap shortcut keys here.