This Micro Tutorial walks you through using a remote console to access a server and install ESXi 5.1. This example is showing remote access and installation using a Dell server. The hypervisor is the very first component of your virtual infrastructure, which is why it's the first thing to do. In order to determine if you have a server that is on VMware's Hardware Compatibility list, please see their searchable guide here.
The following article describes how to recreate the VMDK file of a virtual machine.
It is important that this file is always in the datastore where the VM is stored, because if the VM is not present, it will not be able to turn on and an error