In Reply To #4
There's one in the 2nd part of the level after you get past the first two Axe Knights and climb the stairs. Move past the couple red skeletons and on the opposite side of the wall on your left (right before all the electronic equipment) there's a Double or Triple Shot. You can also, if you're in the last part of the level before death, hit those two red skeletons that are around before you go up the stairs to the final hall before Death repeatedly (probably about 7-10 times) and the next candle you hit should yield a Shot multiplier.
I've played the game, but I can't seem to get by the 3rd level. That one's tough as nails!