The file you need is your Personal Folders file (*.pst) It's where all the
mail, calendar, contacts etc are stored.
Take a look at these pages for info on Outlook data backup or transfer:
http://www.slipstick.com/config/backup.htm
http://www.howto-outlook.com/Howto/backupandrestore.htm
http://office.microsoft.com/en-us/assistance/HA010771141033.aspx

Signature
Russ Valentine
[MVP-Outlook]
>I am using a laptop and a pc and would like to copy my files from on to the
> other, I have a fwe hundred contacts on each.
[quoted text clipped - 9 lines]
>
> http://www.microsoft.com/office/community/en-us/default.mspx?mid=4e85c9b3-733e-4
77b-9c57-5ee16b993492&dg=microsoft.public.outlook.contacts