Sorry for the delay on this, was waiting for some feedback from our developers. We are going to look into adding a new scripted function that will allow you set the window style. It should be a fairly easy addition so hopefully should be in one of the next few betas.
Just wanted to follow-up and let you know that we've implemented this feature request in the latest beta version of DisplayFusion. You can download the latest beta version from the link below: http://www.displayfusion.com/Download/Beta/