In order to run ESXi inside VMware workstation, we simply need to select “VMware ESXi 5″ as the operation system of the guest VM we are creating.
Then, Edit the VM’s Settings, and under the Hardware tab, and processors, check the box to Virtualize Intel VT.
The option to run ESXi inside of VMware workstation is great, especially for when you don’t have a lot of physical hardware to test with.