Help installing the Gibberlings 3 mod

For a second playthrough I want to remove gender and multiple romance restrictions. So I'm trying to install the Gibberlings 3 mod which is supposed to do this.

Apparently I'm a dunce because I can't get it to work. I've downloaded and it asks me where to extract it. I tried in the main folder and it gives me an error message at the end of trying. So I then tried in the Data folder and got the same error message. So I then tried in 00783 folder (a subfolder of the Data folder) and it says it installed properly but it doesn't seem to affect the game as one of the tweaks the mod makes besides romance stuff is making helmets invisible and I can still see helmets.

Help please on what I'm doing wrong.