I can only tell you how I do it in win98 when I have to reinstall a os. I copy the contens of c:\windows\Application data\Identities\ to a safe location (or best zip it. And when I install new os or a different computer i copy the files to the same location. Maybe you'll have to change the {hgvghdgfi-12fdgfd-fsfd} folder that iexplorer creates.
 
There is also a way to import old mail accounts in iexplorer.
 
I don't know if this is what you were asking for, but hope it helps.

actually, i want to import the settings such as exhange server name, userA's pst file location, address book location.. etc..from computerA to computerB
is it clearer to you now?

You can export the all the personal folders by using the Import/Export wizard, but if you're using Exchange server, there's really no reason to, as all the messages, etc. are stored on the server, unless you have each machine set up to download the messages.