1. Go calendar > File > Save as web page
2. In 'duration' put start and end dates, then in options set as desired.
3. Give it a name (no spaces)
4. In File Name put the path to where you want to save the files (prefixed with FTP or HTTP, depending on the protocol needed to get it where you want it!)
eg. ftp://username:password@ftp.yourserver.com
5. Save

See...
http://support.microsoft.com/?kbid=257984