I used a BASIC program to write a routine for PNR's. This was called Cbaspad and has now been updated to HotPawBasic. The download can be found on
PalmGear
The home page is
Hotpaw
It is fairly simple to write. You will just have to customise the Fuel Flow and TAS to your aircraft type for normal /DP /OEI cases.
The registered version allows you to compile routines and assign an icon so you can use them directly from the Home button (or assign a button). It also removes the limit of 4 routines.
Happy coding
Max