Can you open up Outlook at all?
If so go to File..Open..Personal Folders File... Then navigate to wherever the PST file is stored
(I think the default is something like C:\Documents And Settings\UserName\Application Data\Microsoft\Outlook or C:\Documents And Settings\UserName\Local Settings\Application Data\Microsoft\Outlook (your PAB file and rules is probably there to).
If you can't get into outlook try copying the files from your old drive to the locations above and then opening your outlook
Replace "UserName" with your user login name.
Hope this helps,
Brad D.