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Welcome to the Community - ESX 2.x used a web based management tool call the MUI - point a browser at the ESX host and you will be asked to login - use the root credentials and you will be able to restart the vm
I found what I needed in this reference http://www.vmware.com/pdf/esx25_admin.pdf
Look at page 79 for the overview: Using the VMware Management Interface
Then at page 82 for the specifics: Using Internet Explorer 6.0 to Access the VMware Management Interface
It does seem to work best with Internet Explorer 6. I had no luck with IE7, but did not spend too much time at it.