To save you hours of frustration do not use this tool to work with PST files from the windoze OS only with OUtlook Mac and don't bother downloading that from the unmactopia web site because it only works on pre INtel Macs.
To answer the person who says Mac users whine below... no we are simply used to simplicity and to truth... when a program has a suffix you would think a pst is a pst file.. no like most of Microsofts products down through the years you think you are dealing with one thing when reality is quite another. I thought i was buying a tested and useful and secure OS... NO you didn't you bought a product with thousands of flaws... so bad that people hate it and it needs fixes constantly vs an OS on Apple that gets features each week and a few security updates. Who wants stuff that you find on the dark side? you can have it.
you need to take your OUtook from the pc side and transfer it into Thunderbird then bring it to the Mac and rename each file with a .mbox then import them into apple mail or only recently will Entourage allow you to import Mbox files... go figure microsoft to MacroHard.
cheers.... if you use a mac.