I finally found something I've been looking for for a long time so figured
I'd share it at the Outlook groups and forums. If you've ever had Outlook
fail to archive
because it had moved messages' Modified Dates forward making them ineligible
for the cutoff you specified, you'll want to take a look at ArchiveAssist
for Outlook. This app lets you edit the Modified Date of messages to any
date you want (you can select the Received Date, the Sent Date, or you can
specify any date), and you have complete control over the process by which
you decide which messages to include for modification. The program also
lets you to delete messages, in bulk, according to the date parameters you
set in one easy step - a great change from the ten step process I used to go
through in Outlook.

The program runs outside of Outlook, which I like, and it says that it works
with all versions from 97 up. Check it out at http://www.cardiffsoft.com

There's a free 30-day trial version available and the app costs only $19.00
to purchase. I was finally able to cut the size of my .pst file, which was
in excess of 1GB, and things are running more smoothly. No freezes since I
archived...

I'm so glad someone finally did this!

Stephen