Are you sure you still have a leak, or is it possible the leakage you've been seeing isn't coolant that had puddled on your intake during the original overheating? Maybe it sprayed past your radiator cap and got all over your engine compartment?

If you think you have an actual current leak, dry everything off as good as possible (with compressed air if available), then top off the coolant in the radiator.

(Make sure the coolant in the reservoir is at the Max level line, but the coolant in the radiator is the most important level to watch.)

Once the radiator coolant is topped off, start the engine and leave it running until the engine is warm enough that the thermostat opens. (Upper radiator hose should get hot).

Once the thermostat opens, see what the coolant level in the radiator does. If it drops, add more coolant until the level is about an inch down from the radiator cap opening, then continue watching for leaks all around the engine.

I'm wondering if there may have been an air pocket in the coolant passages when the radiator was reinstalled and the system was refilled during the original PS pump repair, and that air pocket resulted in a low coolant level and the subsequent overheating.

If the overheating was unrelated though, and the engine got hot enough, I'd first suspect the intake manifold gaskets since they're known to cause problems because of incorrect torque values during initial factory assembly.

Seems a little too coincidental that the overheating would occur two days after another unrelated repair had taken place though.