Lets us got to school for a moment....
When you hook up the triton to Fl, you wont get any sounds at all for the Fl is only taking triggers from the MIDI language commands which only sends informations such as which keys you press, how gently or how rough you push em or in some modified cases you'll have sliders like whats on a mixing board.
If you want get the sounds from your triton into FL, you gotta do some dirty work and record it manually into programs such as Acid or any wav recording program and chop and edit what you need and load it into FL yaself nah mean.
If you wanna get real technical, have a lot of time and wanna make some extra cash. Make yaself a Triton soundfont for the soundfont player which plays the.sf2 extension. This takes a lot of work which includes recording each and every note and maybe two or three octaves or four....(less takes less cpu power) and using a soundfont editor program like Vienna Soundfont Editor and programs like that have automatic assignment, so they'll take care of building the .sf2 for you once you have the wav files all ready and ya save it, give it a cool name bOurbanboitritonpiano and wollah you have your own triton soundbank. Its very complicated, but if you pull it off properly your looking at about $10-20 just for a couple well built ones..........especially since they are sounds off the triton.
Hit me up if you want to tackle this all you'll need to do is send me a recording and i'll take care of the rest, and it'll make a great shelf item at IllSounds.com and a vital asset to this community.