Hi prettykitty and welcome to the forum!
I'm not exactly sure what you're trying to do here, but check out this link:
http://support.microsoft.com/?kbid=262162
http://www.microsoft.com/technet/prodtechnol/exchange/guides/E2k3TechRef/956f1c14-2645-4b2f-9283-859ae143bddc.mspx
The first link might be what you are looking for... already built by Microsoft :)
Otherwise, I think you would have to create a script to parse the Message logs into XML and then add that xml file as a secondary data source to an InfoPath form. This might accomplish what you're trying to do. I hope this helps!
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Matt Faus
InfoPath Dev Texas
Matt Faus / Microsoft InfoPath MVPQdabra® Software / Streamline data gathering to turn process into knowledge