Upgrade Exchange 2003 SP1 to Exchange 2003 SP2

We want to upgrade our Exchange Server to SP2, is there anything we need to uninstall before we can upgrade?  
We meet the minimum requirement, but when i try to install it, it is asking us to uninstall the earlier version of the Exchange Intelligent Message Filter.

I want to make sure this is okay before i move forward in uninstalling any components in my exchange server.  Can anybody provide Step by Step instructions on the upgrade?
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MidnightOneConnect With a Mentor Commented:
http://support.microsoft.com/kb/935916 has some ideas. Granted, it's written for SBS2003, but the same process should apply.

http://www.petri.co.il/installing_imf_with_exchange_2003_sp2.htm also has some pointers for Exchange SP2 and IMF.
Alan HardistyCo-OwnerCommented:
I have successfullf followed this article numerous times to remove IMF v1 to allow the installation of SP2:
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