For some reason, Rockstar decided to use random, incorrect values for billboard lights, crane lights and joe's diner sign in Portland for the PC version. I simply grabbed the converted GTA3.IDE from the console version and copied over the values at the buttom to making.ide and changed a single value in industsw.ide. They should now work as intended.

Anyway, to install, just copy the folders into data/maps or use modloader.

Update v1.1: I have fixed a few more .IDE values in Shoreside Vale & Stuanton. Fixed a few more things like the Belleville tree shadows, semi transparent mall fences, the airport's yellow lines, etc.