changed your TPS recently? they go bad, and that would do it....

as for the FPR, yes that can affect your idle, as a higher pressure would allow more fuel to spray through the injector when it opens....

other thing is the throttle butterfly in the TB, ive cleaned many a TB and adjusted that 7mm allen set screw so the butterfly plate doesnt stick, only resulting in setting it too far open....

i think a little more info about the nature of the prob might help (i.e. did it happen all of a sudden? you change parts? etc...)

*EDIT* the thing about the FPR is, you should be able to close it off while the engine is running, and watch the idle drop. if that doesnt happen, i would say that its another problem.