iCal for MacOS 10.5 and MacOS 10.4

I recently upgraded my work computer to MacOS 10.5. My home computer is running MacOS 10.4.11. When I was using MacOS 10.3 at work, I used to be able to log into my work computer from home, grab the Home.ics and Work.ics calendars from Library/Calendars/, and import them into my iCal program at home. Now, though, Library/Calendars/ on my work computer contains hundreds of files. Is there a way to acquire my calendar at work and import it into my calendar at home, or is this avenue closed until I upgrade my home computer to MacOS 10.5?