CookieRevised, it is true with the new Messenger Plus! Live
What I suggested a year ago for Messenger Plus! was to save the .txt files in the following way:
My Chat Logs\mcored@betaone.jet\April 2005\hotrod@hotmail.com.txt
My Chat Logs\mcored@microsoftusernetwork.com\April 2005\sean@msn.com.txt
etc.
But since MsgPlus!Live has implemented a Chat Log Viewer like in Microsoft Messenger (above) or gaim, the problem goes away. The reason is, like you said, the View extracts that data out from the text/html files for chat log date, .net passport name and chat session and then present them in a nice way to the user.
Cheers,
McoreD