Separate image building and flashing.

Google_Nexus_5_(lg-hammerhead).mw

@@ -57,11 +57,16 @@ $ fastboot oem unlock
 When prompted on device, use Volume-Up/Down buttons to highlight choice, then Power button to select it.  The Fastboot Mode screen will appear again, and a message regarding flashing will appear briefly.
 
 === Installation ===
-Put your device in fastboot mode. Plug it in USB. Then do:
 
+First build the image:
 <source lang="shell-session">
 $ ./pmbootstrap.py init
 $ ./pmbootstrap.py install --no-fde
+</source>
+
+Then in order to flash it put your device in fastboot mode, and plug it in USB. Then do:
+
+<source lang="shell-session">
 $ ./pmbootstrap.py flasher flash_rootfs --partition userdata
 $  sudo fastboot format system
 $ ./pmbootstrap.py flasher flash_kernel