Stop Admin from changing settings
 

I have installed a product that adds a lot of options to the settings list. I know there is a way to stop an admin from doing certain things, but is there a way to have an admin have access only to those settings.

I don't want them to be able to anything except this.

new usergroup -> give this usergroup access to these settings, but no other admin rights -> give them the link to the modcp. Those settings and only those should show up there. Best is to create a new account and try some stuff. Maybe you need to give them moderator powers somewhere so they can access the modcp, not sure though.

That only allows them to change settings on the board itself, not in the adminCP.

You want an admin to only have access to change some settings from a modification? You would need to modify the code for that modification to only allow certain users to access it.