Power Steering Fluid, Belt and Thermostat Housing question

I had my power steering pump replaced about 4 years ago at a regular service place. I remember them saying they used regular Power Steering Fluid in it. Just yesterday i replaced the high pressure hose. I put in regular power steering fluid. When looking up how to purge the air from it, everywhere I read say to use ATF+4. Does it matter or should I just empty it and flush and refill with ATF fluid? If I should redo it, because i didn't lookup how to do it the first time, which hose do I have to take off to drain it? Is it the one right next to the pressure hose attatched to the pinnion? And I didn't find this also, how do you get the air out of the line?

I couldn't get to the pressure hose attatched to the pump, so I took the whole pump out, in doing so I cracked the pulley off, I replaced that and the belt for the hell of it. When I took off the pump, as I said I didn't drain it, the fluid spilled all over the bottom pulley. And after I replaced the pulley belt and put back the pump, I filled it back up and spilled some over the new pulley and belt. How should I clean that off. Would it be safe to just spray it with a hose, or a brake or carb cleaner or degreaser?

When leaning over the engine to get off the bottom part of the pressure hose, I broke off the thermostat housing. I looked at where it was and noticed there seemed to be some sludge or corrosion type stuff around the edges of where it was. The little bit of coolant that you can see in it looks pretty clean though. What would that mean? Is the coolant in that car supposed to be the green stuff? If I got it flushed would the Orange stuff work in there or is the green stuff recomended?

Thanks

I'll take a stab at helping.
First things first: the spilled fluid. I would recommend getting an engine cleaning solution from the car parts place and following the instructions on it. Should be enough to clean up the problem without damaging the engine.
But, before you do that, you want to solve the power steering fluid issue. My Chilton's manual says to use MOPAR Power steering fluid for 2000/2001 and MOPAR ATF +4 (type 9602) for 2002 and newer models. It also says (or equivalent) after each of those entries.
Now as to your thermostat housing. It really stinks that they made it out of plastic. But your question about 'gunk' around it. You said the fluid inside looks okay, and that is the important part of it. The gunk around it could have come from it leaking, or from another source. You are going to need a new thermostat housing anyway, so clean around it really well, and make sure those bolts are tightened to manufacturers specs (105 in-lbs or 12 Nm). As to the fluid inside: since the system has been opened, you might want to drain the system and start with a full batch of new fluid. Whatever you use, make sure it is all the same type (green or orange). You don't want to mix different brands/styles. Make sure the system is topped off, and let it run when done so it will purge the air from the system.
Hope it all works for you.
Merry Christmas!