Just noticed AIFP version 3.2.10 is now compatible with P3D v4 . I assume it works with 4.1 but I have not made any AI flights in v4 yet .Hope to give it a try tomorrow .
Sorry if this has already been discovered and discussed . This an excellent program and with a little practice very easy . Have used it for many years . http://stuff4fs.com/newpage.asp?folder=AIFP

Rich