Minor fixes, changes and improvements to Hyper-V VMCX docs

website/source/docs/builders/hyperv-vmcx.html.md.erb

@@ -22,18 +22,18 @@ boots it, provisions software within the OS, and then shuts it down. The
 result of the Hyper-V builder is a directory containing all the files
 necessary to run the virtual machine portably.
 
-## Basic Example
+## Basic Examples
 
-Here is a basic example. This example is not functional. It will start the OS
-installer but then fail because we don't provide the preseed file for Ubuntu
-to self-install. Still, the example serves to show the basic configuration:
+Here are some basic examples. Neither example would really do anything more
+than producing a copy of the source virtual machine. However, the examples
+could be used as a starting point for more advanced templates.
 
 Import from folder:
 
 ``` json
 {
   "type": "hyperv-vmcx",
-  "clone_from_vmcx_path": "c:\\virtual machines\\ubuntu-12.04.5-server-amd64",
+  "clone_from_vmcx_path": "c:/virtual machines/ubuntu-12.04.5-server-amd64",
   "ssh_username": "packer",
   "ssh_password": "packer",
   "shutdown_command": "echo 'packer' | sudo -S shutdown -P now"
@@ -71,12 +71,14 @@ builder.
 
 ### Required for virtual machine import:
 
--   `clone_from_vmcx_path` (string) - The path to the exported virtual machine
-    folder.
+-   `clone_from_vmcx_path` (string) - The path to a directory containing a
+    previously exported virtual machine. The exported machine will be used
+    as the source for new VM.
+
 
 ### Required for virtual machine clone:
 
--   `clone_from_vm_name` (string) - The name of the vm to clone from. Ideally
+-   `clone_from_vm_name` (string) - The name of the VM to clone from. Ideally
     the machine to clone from should be shutdown.
 
 ### Optional:
@@ -94,11 +96,25 @@ builder.
     Packer to wait for 1 minute 30 seconds before typing the boot command.
     The default duration is "10s" (10 seconds).
 
--   `clone_all_snapshots` (boolean) - If set to `true` all snapshots will be
-    cloned when the machine is cloned.
+-   `clone_all_snapshots` (boolean) - If set to `true` all snapshots
+    present in the source machine will be copied when the machine is
+    cloned. The final result of the build will be an exported virtual
+    machine that contains all the snapshots of the parent.
 
--   `clone_from_snapshot_name` (string) - The name of the snapshot to clone
-    from.
+    If `clone_from_vmcx_path` is set, this setting has no effect and any
+    snapshots associated with the source VM will also be present in the
+    resultant VM.
+
+    If `clone_from_snapshot_name` is configured, this setting has no
+    effect and the resultant machine will not contain any snapshots.
+
+-   `clone_from_snapshot_name` (string) - The name of a snapshot in the
+    source machine to use as a starting point for the clone. If the value
+    given is an empty string, the last snapshot present in the source will
+    be chosen as the starting point for the new VM.
+
+    This setting only has an effect if using `clone_from_vm_name` and is
+    ignored otherwise.
 
 -   `cpu` (number) - The number of CPUs the virtual machine should use. If
     this isn't specified, the default is 1 CPU.