When you are at work, post the exact error. I suspect that you are importing the file wrong. are you sure that the file is a 2003 pst? There was a change from the 2002 and before versions when you go to 2003. Something about unicode vs ansi I think.
No i am positive its a 2003pro pst, . I have a feeeling it's been corrupted, but I can't say for sure yet. I've tried setting it up in control panel > mail, but it claims the file isn't compatible with 2003 sbe.