I run Tiger on a Powerbook G4 1.67 gHz. I used to run entourage which was synched with the office server windows 2003 so I had access to colleagues' calendars and vice versa. I decided to switch to apple mail and ical as this worked with a email database called Mailsteward which I like a lot. So I imported entourage into ical but have ended up with everyone's calendar on my ical calendar. This is now a real mess. I am not able to add new events nor delete existing events on my ical and would like to just delete all existing calendars on my ical, delete all colleagues' data on my entourage and then start again by importing my personal calendar data into ical. Could anyone advise me how to do this ? Have searched high and low on the net for pointers and drawn a blank - many thanks for any help, Tony