It's a lot of questions, Hamstray.
Okay, for capturing screen shots, there should be a button labeled "print screen" somewhere on your keyboard. All you gotta do is hit that button. When you do, it will seem like nothing happened, but then if you go into Paint and hit "Paste" an image of the whole screen will show up and you can edit the image as you like.
There is one singular answer for all of your questions regarding Set Editor, and that's to just go to the Edit menu and select "Set Options." Just about everything you asked about is in there.
As for your parents, I think you have two options. One is to just forget it. It sucks, it's not fair, but badgering your parents isn't exactly nice either. Or, you can go for one last big score and use the following rationale, (Note, this will only work if your parents are Christian though):
Ask your father why he has such a hard time believing that somebody out there wants to do a nice thing and ask nothing in return. Compare the situation to the life of Jesus, saying that all Jesus wanted to do was make the world a better place, but nobody trusted him because he seemed "too good to be true" and so he got crucified. Argue that it doesn't make sense for somebody to deny themselves a genuine act of generosity.
PS: And yes, what I just said does suggest that Spidey and Train are Christ figures. May I never live it down.