Andrew Kutz has released the source code of his tool that can add port groups to all your ESX servers via the commend line. Although his application is written in C# you can get a good understanding from the comments Andrew wrote in his code. Especially those about the traversal object. Andrew has been professionally involved in the technology sector for 11 years. For the last six of them he has worked with the latest technologies while employed by the University of Texas at Austin. Two years ago, Andrew started his own consulting firm and development house, l o s t c r e a t i o n s. He is also a founding member of the Austin VMware Users' Group (VMUG). His current pet development project is Sudo for Windows.