ZJ radiator replacement/ electric fan install

[Mikeg1005]

My DD is a 97 jeep grand cherokee... Three questions about the radiator...

First, I am loosing coolant at a very slow rate and I know its not a headgasket or anything, the bottom corners of the radiator have a green haze on the blades... is this a sign of a leaking radiator??? I checked the hoses and they appear dry/no leaks.

2nd... whats all involved in pulling the thing out and sticking a new on in there... I have done them before, never on a ZJ, anything special or just fan shroud, hoses, and bolts that hold it to the body???

And lastly, when it get warmer and I replace the radiator I will be putting electric fan(s) on the thing, if its above 80* out and I sit in traffic w/ the AC on it will begin to overheat and once I shut the motor down w/ out it cooling off it pisses radiator fluid out... I know that XJs are known for heating issues, does the same hold true for the ZJs? and is there a stock curcuit/sensor on the jeep that you could wire into that would allow you not to need a fan temp/start up unit??? Or am I just going to have to do the whole thing? Just seeing if maybe there was an option to have electric fans and the curcuit is just not used in the computer or sometihng.

MIke.