Well more than an how-to, this is a request for an how-to, assuming someone figured it out, and/or it’s even possible.
In a nutshell — I haven’t upgraded to Skype4 yet. Because of the annoying (and useless) huge window that the skype main screen has become 🙁
There is a workaround out there, with a tip suggesting how to get the conversation window out of the main screen, and then minimize (!) the main screen, but that doesn’t really solve the problem.
See for yourself what you get in terms of eaten up screen estate by upgrading from skype 3 to skype 4… if anyone knows how to get this huge blue thing off that would surely be of help 🙂