Hello, I'm looking to share a presentation with a client who's using Windows XP. Skype has a beta version for Mac and Windows that has video conferencing features and a screensharing feature, but Skype is a complicated program for computer novices... the very people I'm presenting to over 600 miles away. I'm looking for a free solution that works cross-platform. I must be able to share a presentation and communicate using audio. Video conferencing features are a plus. Is there a solution for me?