If you set VstSynthFont as the default Midi Device you can set each channel to a soundfont or a VST instrument as default. Don't know if the latest PG version has this or you need to get the one from the website http://www.synthfont.com/Downloads.html
Updating VSTSynthfont

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BB22-VstSynthFont-VST-Instrument.png (109.93 KB, 140 downloads)