Fran

If you have Sonar then you probably should have Live Synth pro as a DX plugin with it. That's how I am currently using Soundfonts. Open up an instance of LSP in Sonar, assign the midi output of your style player to the input of the LSP's midi channel ( select midi in "Omni" for all channels to play ), open up your soundfont in LSP and voila.. it works. You could substitute an app like Forte or SFZ+ for LSP as the soundfont host. I've also used the latter with no issues.

I use the Maple midi virtual midi cable as my connection between One Man band and Sonar / LSP.

AJ