How to access Outlook 2007 emails from a crashed computer?

I had a Toshiba laptop, running Windows XP, crash over the weekend and have decided to start using another machine (an Acer Aspire 5570Z, with Vista), even if I'm somehow able to get the Toshiba working again. (I still plan to try using the disk diagnostic tool recommended here earlier; just not today - I need a working computer for the week).

All of my files (Excel, Power Point, Word, photos, etc.) were backed up on an external hard drive. I am unable, however, to find a back-up of the Outlook 2007 email folders/files. Outlook 2007 is working fine in the Acer (Windows Vista) laptop. I was able to receive all emails sent during the last few days, after the Toshiba crashed.

Is there somewhere I am failing to look for these files/folders? They are not in the Documents and Settings folder with the rest of my data.

Also, if I find that I have not successfully backed-up/saved the Outlook files, is there some way to access them on the Acer? Or must I get the Toshiba working again and resend the important ones?

Thanks in advance, and kind regards,

Jeni