...to be honest i'm not sure what the other things (throttle body/oil cooler) are for. Keep it quiet though as i don't want everybody to think I'm an idiot.
The throttle body is the bit that your accelerator attaches to. The accelerator cable rotates a cam, which causes a metal disk to rotate, widening the opening and allowing more air to flow. The car senses this (via a number of sensors including the throttle position sensor and the mass air-flow sensor) and asks the injectors to add more fuel. The bigger the throttle body, the more air flows, the more fuel is added, and the more power you get. The ST200 is a few mm wider than the Cougar's ST24.
The oil cooler could be one of two things, but I'm not sure what Tim's got. It's either:
a) An extension to the oil system that includes a radiator of sorts. That's racecar technology, but available for the street. Or...
b) A water jacket module from the ST220 - which has the same basic block as the ST24 so it's a straight fit - that runs around the base of the oil filter mount. Calling it a "cooler" isn't quite accurate; your water heats up faster than your oil, so in the early stages of running it actually
heats your oil to get it into an effective temperature range and protecting your motor. It's only once the car is getting hot that waste heat from the oil is taken away and shed via the main radiator.
Lastly, nobody here will call you an idiot for not knowing things.
What Sam said , pop the plastic access panel off once you've removed the door card and remove the sponges and treat the inside of the sills/wheel arch with a rust proofer whilst youve already got the door card off
I strongly recommend Bilt-Hamber Dynax in the spray can. It gets
everywhere.