OK here's how to use a soundfont in the free Crystal synth.
http://www.greenoak.com/crystal/index.html
First find the folder on your hard drive called CrystalPatchBanks. It will be in your preference folder.
Make another folder to be placed in the same preference folder (not in the CrystalPatchBanks folder) and call it CrystalSoundFonts. Name the folder exactly like this. It should now show up in the preference folder right under the CrystalPatchBanks folder.
Inside the CrystalSoundFonts folder you can place your soundfonts. I have made separate folders inside the CrystalSoundFonts folder to categorize them. Such as Ethnic, Orchestral, Synth, and inside those folders I place my soundfonts.
Now its on to the Crystal Synth itself.
Call up the Crystal Synth window. You will see 5 tabs which say "Modulation", "Voice 1", "Voice 2", "Voice 3", and "Mixer"
Click the Voice 1 tab. You will see a window called "Oscillator"
In the Oscillator window you will see a pull down window next to the label called "Type".
Click on the pull down window and you should see "Synthesized", "Sampled", and "SoundFonts"
Select the Soundfonts pulldown to access your soundfonts.
What this allows you to do is to select what source you want to be the Oscillators generator. In this case it is a soundfont.
So in effect you can use soundfonts to create a synth sound that is purley from that soundfont or mixed with other variables.
You can do this with each of the 3 voice sections of Crystal.
Of course when you first access your soundfont it will most likely not sound as if its straight from the soundfont. It will most likely be influenced by leftover parameters already in that selected Voice tab, and also by whatever was happening in the mixer section.
You may have to null all those parameters to get your straight soundfont to sound in its original way.
Yes i know this is a long roundabout way to get a soundfont to play but its also pretty exciting to find a synth that will allow you to use 1 to 3 soundfonts to create a whole new sound. Perhaps thats redemption enough for all the work.
I'm sure this will be exciting to those who like to program a synth for their own unique sounds. Me I'm a preset junky and mostly use whatever presets I find in any synth I use but I greatly admire anyone who can program their own synth sounds.