You can actually read the Manual (online version, identical content to the PDF) at www.SpaceRangers2.com.
Just click on the "Game Info" button near the top of the screen, and it walks you through all the details.
The manual has been updated in a few places, and doesn't answer EVERY question. For folks who want all the details for what's under the hood of a program, it's only vaguely satisfying. For folks who are happy to understand the high-level mechanics, and then figure out the other stuff during gameplay, the manual is just right. Depends on your tastes, really...
This is a VERY deep game, I think, and half the fun is exploring some of the unfamiliar bits of the game and seeing how things work. The original developers were Russian, and it looks like they skimped on the translation budget for the manual port to English speakers.
Still, the manual tells you more than enough to get you started and point you in some very specific directions!