Load plugin presets via midi

Hello everyone!
I’ve got a problem. I want to use Waves GTR ToolRack in Cubase 6.5 to play the guitar live. I need to be able to select different presets in real-time via midi, for example, or in some other way. The sad thing is that Waves GTR ToolRack doesn’t support such simple and obvious thing as selecting presets via midi (only next/prev preset).
The other way is to save and load presets in the standard cubase presets dialog. So the question is: Is there any way to load these cubase plugin presets using some kind of automation or midi?
Any other thoughts and considerations about this problem are very appreciated!
Thanks for any help!