Click the subscribe button.

just subscribe, and play prison architect for a while, it sometimes takes a while before steam installs a mod

Then go to the menu and click extras. Then go to mods and enable this mod :D

still dosent work for me! any ideas?

i have the saim problem

The Mods menu for me has always said "downloading." Like Dyno said, make sure to look in the extras menu, enable the mod, then restart PA, should be good to go after that.

For me it doesnt download any files just mod folder with thumbnail and data folder which is empty, please help (it happens to all texture overhauls mods actually)