Thank you everyone for the help!
I figured out the problem just a minute ago. I had installed it correctly, it was quite straight-forward as a few of you pointed out. The thing which I didn't take into account was that the motor was yelling when it was trying to open up the lens even further, past the max f2.2. That's when I took a glimpse at the light meter controlling plate/dial, and noticed that the poor camera was trying to cope with ASA 25 film at 25 FPS. My room ambience isn't by far enough for that, hence the yelling noise.
And speaking of Babelfish, it's a really good service, but with stuff like this I'm hesitating to use it. It's all too possible that you miss just that one important button/glitch/problem because the site doesn't convert just that word. But I guess the german was a bit awkward anyway(the author is from Bayern, if that clarifies).
Now I'll start learning how to load film with this beautiful monster.
Again, many thanks!
Yours,
Mikael