This makes me nervous.

Exchange Server 2007 is being released only as a 64-bit product. However, 64-bit systems are NOT required for teaching these Exchange Server 2007 courses.  A 32-bit training and demonstration version of Exchange Server 2007 is being used for all courses.  Most of the courses require hardware level 5 and Virtual Server 2005 R2.

What could possibly go wrong? :-)