Exporting Outlook 2003 to Outlook 2000

I have Outlook 2003 installed at work. I have Outlook 2000 at home. Prior to 2003 I exported my work calendar and imported it on my home PC. However, now that I have 2003 at work, my Outlook 2000 does not accept the .pst files I’m trying to import from Outlook 2003. Other than purchasing Office 2003 for my home PC, are there any workarounds?