ImpeREAL City won't install

[Tempast]

ImpeREAL City refuses to activate, and I have no idea why. When I double click it in OBMM it asks me if I want to merge all the files into one esp instead of 10 esp's so I hit yes. Then it asks me if I want to install a lightles variant, and I click no, because I have a good rig and can handle this. Then I choose the type of lights on the tower, and it asks me if I want it to alter the Oblivion.ini so the light mod can work. I click yes and it pops up with another window asking me to change my "uGridsToLoad" value. It asks me to use an odd number, and tells me my default is 5 and the current is 5. This is where it starts acting up. I hit okay and a new window pops up with a 5. I hit close and save and it tells me I have entered an invalid value. So I try it again, with 3, 7, 9, and 11. None of them work. This is starting to be a pain, as I like having lights in cities. Any help on the issue would be greatly appreciated.