Hey again!
I have made some tests about my relative slow FPS rate, and I have got some strange results. At a blank white screen without actors and backgrounds, it has reached the 60 FPS - thats alright.
But! After I put a 800x600 background and 6 actors to the screen (these were 4 buttons, and 2 "static" actors) it reduced to 40-45 FPS. I think it should have not happen. The buttons have some "if mouse enters the region of actor" events, and the scene has a "if clicked on actor" event for every button. So it's essentially nothing exhausting for the engine, and it works not properly.
After that, I dont have to say, that if I have interactive actors with something actual happening on screen, the FPS goes down to 30...
I have read the Stencylpedia about this problem, but I found everything alright by the events. There are only a few "always" events, and nothing is responsible for my troubles.
I have a lot of work in this project, and I dont want it to be useless because of the slow FPS, soooo.. if somebody has some tips for me, please help

There is a short video from the game, it might can help to see what's wrong...
https://dl.dropbox.com/u/11271554/trailer.mp4(If you think that the smoke is my biggest issue, it's not, it reduces the FPS rate by 1-2 in average.... If I take out the big background, and the smoke, it is about 34-35 FPS... That's not good enough I think, so these aren't the reasons)