START> All Programs> Aerosoft> PFE> Commands, this will open a webpage with a list of the commands, there you will see where you can use the option Request Cleared To Final At Pilot's Discretion in the approach section, if you try to use it too early PFE will tell you its not possible yet.
Another better option is the use the program PFE-Displayer which shows you the key commands interactively. You will find the program inside the C:\...\Aerosoft\PFE\PFE_Displayer folder, just create a shortcut to PFE_Display.exe so you can start it easily, I have it pinned to my start menu along with PFE, Remote_Text and PF2000.
I got it from PFE website! Got all the commands printed out. I says its ideal to set the last waypoint to 4000?
So if you let pfe do it what alt do they descend you to then and how will they know?