This wonderful application has, unfortunately, not worked with Leopard for some time, as best I know. I believe the developer indicated that Apple made changes to Leopard that broke the functionality of Finder Window Manager. To me it was indispensable, and I have searched everywhere for anything that could replace it. My use of it was relatively simple — I just wanted to have my windows snap to a preset position in the Finder, with the correct Sidebar and text settings. It could do much more than that, of course.

Turns out it is possible to control window positions from the keyboard with another app, Keyboard Maestro, which can record macros. Don't know yet whether it can do this automatically, as could Finder Window Manager.