Correct; I really want to continue this, but I have a lot of other things in flight. WC2 is also a significantly larger project than the earlier games.
One interesting conundrum: Fixing cut scene frame rates. If there's a voice, the frame rate is set relatively low in order to stay synchronized with the audio playback (I can't remember the exact number offhand, but something like 25 fps); if there's no speech, the frame rate is set all the way up at 75!
Instead of trying to fix it, why not try to put "speech"(a single "silent" audio file), onto those dialogues, and point in speechless conversations to that file everytime? It should fix the framerate, and avoid the flying cockpit(That really is CPU speed, or video card speed related).