I do not know of any utilities that would help but I can suggest a way to
migrate your messages.  Since both Pegasus and Outlook work as IMAP clients,
you can move messages from one to the other via an IMAP server.  The best
way is to get a free IMAP server (several exist) and install it on your PC
for the purpose.  I recently used this method very successfully to migrate a
friend's email from Earthlink TotalAccess to Thunderbird.  There is one
possible problem with this strategy -- you have to do it one folder at a
time.  You select all messages in a Pegasus folder, copy them to a folder on
the IMAP server, then, in Outlook, select that folder on the IMAP server and
move all messages to a local folder.  If you have just a few folders, it
should be easy enough but, if you have hundreds, it could be a pain.  The
method should preserve all message dates.

You could save one step in this process by installing a product of mine,
MailRelayer, that sets up an IMAP server effectively within Outlook itself.
Then you just need to copy each folder once.  You can find it at
www.mailrelayer.com .  As you should likely be able to complete the
migration within MailRelayer's 30-day free evaluation period, it need not
even cost you anything.

Unfortunately I know of no similar means for migrating address books.

Pete Maclean