In that order:
Zetec 2.0... Look in the Zetec Forum. The Duratec is the 2.5L 6-cylinder.
Check the Transmission Forum (I know nothing about slushboxes, having never owned one

)
I've noticed that the amount of spray on the windshield depends greatly on vehicle speed. If you're sitting still at a light or something, then most of the spray ends up on the top of the car. If you're doing 90 (my speed of choice) then most of the spray just hits where the wipers are at rest. It's calibrated to hit the middle of the windshield when you're doing about 60 or so. I assume you've checked the level of washer fluid? Or you could have a shot washer pump

.
Intakes, exhaust, chips, racing stickers, big a** wings and grotesque body kits, some 22's with 30 series rubber... the usual

Use the search function... it requires you to do more work than most, but you can find stuff. The FAQ on the main page works wonders as well.
Also, include more info if you can about the car, like mileage.
Welcome to the club. Glad to have you.
Peace
Jed