A mod to make your unit to have individual Level and more

[kolz]

what should I exactly do to install this mod?

I download it and unzip it, but I only see 1 data _"soulbook2".
Anyway I copy it to session/addon ,but nothing happens.
Then I read some of the post on the forum and made some folders in session/data/mods and then copy soulbook2 in there but still nothing happens.

I am confused..
please someone help..
where should I read??