Hallo.
As far as question 2 is concerned it seems that you have found the answer. You can find more info in the readme files accompanying OLC's mod.
About question #1:
With OLC's mod activated if you click on "Realistic" while you're at the Realism Options in-game page you get 100% realism. That leaves the "No Event Camera" option unchecked by default. If you insist on having this option enabled and for this reason check the corresponding box then no changes will be applied to the realism percentage. The same goes for the other unchecked-by-default options. Alternatively, you can change the settings by editing the GameplaySettings.cfg and i mean the one that comes with OLC's mod. Last but not least:
http://www.subsim.com/radioroom/down...o=file&id=1112
Sorry, i have to go now.