After reading you guys, and keeping the trial and error method, I finally went on to AE and right clicked on the video (inside the browser), and just re-interpreted the footage to 40fps inside After Effects! I am HONESTLY really sorry for asking such question with such a simple answer, hehehe…..hehe…..he…..he……
Also, I went to Compressor again and tried the thing by changing the duration and the final fps (into one of the standards), wich I kinda always knew from the start, but didn’t manage to quite understand that couldn’t be done; I thought I could just edit in 40fps and export into a standard fps… What I wanted specifically was to “conform” the source video into 40fps like Cinema Tools does (like just changing the media header from 60fps to 40fps). In the end, I even tried to manually change the headers with Atom Inspector, which rendered a great result.
I found a better solution with After Effects’ stock plug-ins and functions (frame blending went well, no noticeable warp) for this problem, but the twixtor knocked me out with the (watermarked) result! UNBELIAVABLE!
Thank you very much for your time and help!!!
Starting in Pro Video – Musician (@LaVesper – http://www.lavesper.net)