Ways to speed up Entourage 2004 ?

[Pitch]

Title: Ways to speed up Entourage 2004 ?

(I've posted this on Entourage google groups. Please ignore if this is going to the same group)

I'd like to ask the long-time users of Entourage what they've found works to
help speed up the app when it starts really slowing down. Been using E'rage
since its first OS9 rendition. For the past 4 months, my Entourage (11.2.5)
has become painfully slow to use. Typing is always a character or 2 behind.
Deletion takes a few seconds. Etc. Because E'rage is the center of my entire
business, this has become unworkable.

Here's what I've done so far:

·· I've been vigilant about keeping the Identity folder fairly
small, well below 1 gig, even though I get 200 emails a day. I
constantly completely delete all Sent and Delete items older than 6
months ago
·· I remove all attachments larger than 500K.
·· I've rebuilt and compressed the Identity many times.
·· I have very few Rules (6 total) and only 14 total Folders and
subfolders (if this matters in terms of speed).
·· About once every 10 months, I duplicate the Identity, strip out
stuff I don't need to look at on a weekly basis, rebuild that, and use
that as the only Identity.
·· Twice I have started from a new completely empty Identity, and
using Paul's Import/Export apps, brought over the Accounts, Calendar,
and Address book.
·· I have 3600 Contacts in the Address book.
·· I don't use the Project Center. I have about 200 Tasks. I use
the Calendar and Office Notifications daily.

At this point, I'm open to ANY ideas. If someone says that deleting
Entourage and installing it again from the disks will speed it up
(complete with a blank brand new Identity), I'm game to do it.

Any ideas?

Many thanks,

Scott