Nested ESXi 5.5 lab

Having one hell of a time getting my nested lab up and running. Anyone nested ESXi 5.5 yet? I am trying to nest 5.5 inside of 5.1, but I cannot get the host to pass on the virtualization bits to the virtual ESXi hosts and get the error about hardware virtualization not being turned on in the host. I have followed this link already, so there's more to it - possibly the .vmx file needs some other entry for 5.5.
So what are you guys doing for a nested lab? Workstation?
So what are you guys doing for a nested lab? Workstation?
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But, I'm intrigued. I must try this nesting in 5.1 now.
Blog: https://readysetvirtual.wordpress.com
[edit]
I don't think it was this one, so I'll keep looking, but it may help.
http://www.virtuallyghetto.com/2012/08/how-to-enable-nested-esxi-other.html
Blog: https://readysetvirtual.wordpress.com
Blog >> http://virtual10.com