I will answer part of my own post ;-) Nope, DISABLE TRIGGER IS NOT an event that can be captured with DDL triggers.
However, I see a possibility in that the catalog view, sys.triggers has a field 'is_disabled' in it. So, if I can just figure out how to put a DML trigger on it, or on the appropriate table it gets this information from, I'll be able to do what I want to do.
Of course SQL Server 2005 doesn't allow you (at least through studio) to script out how sys.triggers was created, so this is where I am now stuck ;-(