This still very much in early development, but the proof of concept has been completed. As I mentioned a while back, SIBIAC was eventually going to hopefully be brought to Reaper, since I am a former Sonar user. Well, I now have a video demonstrating Addictive Drums 2 in Reaper using SIBIAC, which is an NVDA Add-on. This gives me complete control of AD2, except for specific effects, however, I can turn on and off channel specific effects. Here's a video showing off this add-on in Reaper in action.
Guitar Rig 5 and Absynth 5 have now been adapted to work as well. You can now use NVDA to browse presets in the UI