Hello PatrickBlack,
Unfortunately that old mod is incompatible with the new system; because it overrides / removes the assets. The option you suggested must be added by that mod.
Please see this FAQ answer,
Can I use 2.0 "Visible Planets in Space" together with this?
Currently, no. Because Visible Planets in Space disables/removes the new planet models this mod is altering. Until that is fixed in the future, activate only one mod for the time being.
If you have any suggestions about how to make these two mods compatible, I will try to implement that functionality but I couldn't find a viable way.
Thank you for your interest.
Best Regards.