>>Hi Mike,
>>
>>It can be found at: http://www.microsoft.com/msdownload/iebuild/chat25_win32/en/chat25_win32.htm
>
>
>I couldn't find that! Thanks.
Hmmm... it does look like it's going away though. Here's an excerpt from http://msdn.microsoft.com/downloads/webtechnology/ie/issues.asp:

Microsoft Chat 2.5
You can no longer install Microsoft Chat 2.5 when installing Internet Explorer 5.5 and Internet Tools Beta. If you previously installed Microsoft Chat 2.5 and then upgraded to Internet Explorer 5.5, you will be able to continue to use your existing Microsoft Chat 2.5 client for a limited time on the Microsoft Chat servers. If you do not have a Chat client already installed and you would like to install one, or if you already have a version of Microsoft Chat installed, consider installing the new MSN Chat from http://webchat.msn.com.