hehe. That website is mine. I also posted it here.
Anyway, First remedy for the trigger should be to grease up the firing pin block and the nubbin on the trigger bar that pushes it up, and dry fire it several hundred times.
There is supposed to be lube at that contact point according to the manual, but S&W seems to not be lubing it from the factory. Unlubed it is REALLY gritty. So much so that after test-groping one at the store, upon delivery, I was like "ah crap, this isn't usable." Now mines a bit nicer than the store sample (the store sample had been lubed and test driven qute a bit by the staff).
The striker removes much like a glock. Take the slide off, look at the bottom. You will see the leg of the striker protruding. There is a white bit of plastic between it and the barrel end of the slide. Use a punch or the gripstrap retainer to push the plstic bit towards the barrel end of things. Slide out the textured plate at the rear of the slide.
As for the firing pin stop, you take the rear sight off and it comes out through the top. It's apprantly pretty easy to get the sight off once the set screw is removed.