Classical composer here. Anybody tried Igor Engraver notation software ( with GStudio?

My thought is to get the simple Conexant GM library for GSt (with the standard 128 instruments) and see if Igor will recognize GSt and this library like it does a synth and automatically set up and playback the appropriate instrument when I select a \"flute\" or a \"violin\" within Igor, for example. Anybody tried it? Should work with Gs EndlessWave as my Midi-Out in Igor, no? Might be an easy way to develop a nicely notated draft of a composition at the MIDI level before assigning better quality sample voices with Gst (Garritan Strings or whatever) and going to work on the digital audio level? Thats my reasoning anyways. Thanks for any comments, LifeForce