Fruity Loops does have a soundfont plugin, but unless it's a registered *ahem* copy then you won't be able to save, but one thing you could do if you have a decent soundcard with nice midi sounds is create a midi out channel and set the port number to 1 so that it uses your soundcard rather than rely on Fruity LSD or the gm.dls, or if it's FLStudio then it's a simple matter of just adding a Midi Out channel and again setting the port to 1...