This feature allows you to use Virtual Studio Technology DLL instrument plugins to play back the score you've created. In the parts dialog there is a VST button that allows selecting and tuning a unique VSTi for every stave. To use this feature, download VSTi Plugins(must be *.dll files) and save them into the same folder. Open the Audio Options dialog and specify which folder the VSTi Plugins are located in. Select each stave that you want a VSTi plugin to play
Also please visit http://www.kvraudio.com, which is a comprehensive information resource for all types of plugins, including VST and DirectX plugins.
Input VSTi preset name to save the current preset as another one.