Create file to download World Cup fixtures to calendars

Hi, I want to create files that I can send to my clients so that, when they click on it, it will automatically download the fixtures of the 2010 FIFA World Cup into their calendar. I need a file for each of Microsoft Outlook, Yahoo mail, Hotmail, Gmail, iCal and Lotus Notes. There are 64 World Cup games, and therefore 64 calendar entries. Times should be based on GMT. I need to get my branding onto each entry somehow (would be some text and a jpeg file). Needed by the end of the week. Thanks, Simon