Hello ml1n4,
In Vista, PST file default location is in folder drive:\Users\\AppData\Local\Microsoft\Outlook. It is a hidden file, so you have to unhide hidden files. Open Windows Explorer or any folder. Click the Layout button (to the left of the Views button). Click Folder Options > View tab. Check "Show hidden files and folders". If you want to see system files as well, unclick Hide protected operating system files. Click OK
Copy the PST to new hard drive. Then import it into Outlook 2007.
Hope this helps!
war1