Hello. I want to give a Keynote presentation to co-worker across the global via Skype. I just tested the screen sharing feature of Skype using my 17" MBP and a PC next to it. I found that when I played the Keynote presentation, there was a lag between the text slide on my screen and the one shown on the PC next to it. Video playback was even worse. Any suggestions to improve the situation? Is it possible to play Keynote presentation without having the presentation occupying the entire screen. Perhaps half the screen is devoted to skype and the other half is devoted to Keynote? Thanks.