One of the benefits of blogging is having a place to capture items that might be worth remembering when problems occur.
Recently Microsoft released a technical article on running Microsoft Dynamics CRM v4.0 in a Windows 2008 64 Bit Server environment.
Some of the Key Items include an
"Error message when you try to open the Microsoft Dynamics CRM 4.0 Web application"
but the article also includes work arounds to many of the issues discovered in the field.