Store as single file -> Edit VM -> Set more ram and CPU -> Select HDD and remove -> Add new HDD -> SATA -> Use existing HDD -> Browse to El Cap.vmdk you downloaded and unpacked-> Keep existing format > Remove CD/DVD -> Show all USB devices -> finish ->
Thanks to this video, (where only the first 3:30 minutes are relevant to this guide,) I wrote a step by step solution to building a hackintosh virtual machine that runs on top of Windows.
Here is a guide to show how to build an OS X El Capitan virtual machine that runs on top of Windows 7 or Windows 10.