I have a DFP with button assignments set for things like (F9) with button 4 and F10 with button 5.

However for some reason while these work in the test area, they dont work in LFS.

In LFS if I go into "controls" and press button 4. it shows that button 4 is depressed... therefore if those keys work shouldnt the profiler be picking it up?

there is a way that works /wo profiler.
in lfs u can assign the fbuttons to joystickbuttons.