Almost got answers for all my questions, can lockstep be used?

I might be missing somthing but does any of the functionality require vCenter?

Hi, I have the following problem I need to create a software SAN to enable VMware HA and other functionality but I don't have capacity in the rack for another server to install the SAN software on, can I install it as a VM, additionally could the software be configured to replicated from one ESX box...