|Unfortuantely, this option isn't inherent to OE. In order to import into OE, you need to select another email program to import from. So, if you want to import your sent items, from Outlook, you'd need to export the Sent items to a pst file, then install Outlook on the second computer, then running the Import Wizard in IE to import the messages.|
I haven't worked with Vista, but if you could install and configure OE on machine number 1, you could run the export/import, then copy the sent items,dbx file from computer 1 to computer 2.
If you own both computers, why not just install Outlook on machine 2?