If you want to quickly archive a group of messages in Outlook to a text file, there's an easy way to do this.

Simply select the messages you want (use Shift-Select to collect a range of consecutive messages or Ctrl-Select if you want to hand pick them from different places in the same mail folder) and then choose Save As. Your only choice for format will be Text when more than one message is selected.

In Outlook 2007, use the Office button to access Save As and with Outlook 2010, you'll find it in the File tab:

Save As

Suzanne