Installation of Proxmox VE 3.2 on an ESX 4.1 host. Note that KVM in Proxmox VE is not supported due to VT-x virtualization not being supported in ESX 4.1. ESXi 5.0+ support VT-x virtualization which would allow for Proxmox VE KVM support. OpenVZ containers in Proxmox still work without issue.