Very nice mod, and they made female githyankis look a lot nicer.
Not sure...this is what I found:
Can mods deactivate achievements? No, it should not affect your achievements. This isn't console where game devs can stop you from getting your achievemnets if you made changes to your game. Some games do disable achievements when mods are involved, like Skyrim. Ironically enough, there is a mod that re-enabled achievements.
Well thats incorrect, when I tried to install mods to improve the cantrips, it said that I wouldn't unlock any more achievements for that playthrough so I then deleted the mods.
The mod author that fixes the achievements says in a post for the mod that he didn't disable the warning.