I was a bit disappointed at first when I thought that there was no manual with the EGHP (Popham) airfield add-on, especially when I found that the UK Air Traffic Service doesn't seem to have an AIP for EGHP. This scenery is SO good it begs you to use the correct procedures. HOWEVER - I then found it. The installer puts the user guide into the root FS-X folder so that FTX Central doesn't pick it up. If you want to add it to your list of user documentation in the FTX Central Panel simply move it to the ORBX/User Documents folder.