Does anyone know if there is a way possible to take a PST file from Outlook 2010 and get it to import into Thunderbird? I have searched/tried/searched/tried and searched and tried over and over without success. I have used several programs that promise to do so, but don't. I know there is an import function in Thunderbird, but it doesn't work for me.

It is the last thing I need to do to get rid of MS Office completely off my system. Any and all help would be appreciated as I know y'all are much smarter than I am!
Thanks