As all of you vMA 4.1 users know, you cannot gracefully shutdown your VMs and your ESX host. I have modified/enhanced the scripts of William Lam and added others to include a two page Word Doc trying to explain how I got it to work flawlessly. I hope this is of help to all of you who had to go through what I went through to make this work.
As of 3/17/11 there is an updated DellVMwareUPSShutdown.doc
Best Regards,
Michael Cecanese