Does ESXi5 support nested virtualization?

Hi friends

I have a requirement of installing RHEL6 Guest OS on a RHEL6 Guest of ESXi5 Host. Is it possible to install or do you need to tweak something or the ESXi5 simply does not support it? I tried installing like that and it says that:

Error pooling connection 'qemu:///system': internal error Cannot find suitable emulator for x86_64.

It is possible in VMware workstation. there is an option in VM settings that: Virtualiza Inter VT-x/EPT or AMD-V/RVI

but i could not find it in ESXi5.

Any suggestion is highly grateful.

thanks