well all i know of is to use the paint bucket tool. (very hard) put the little thingy on the lines and click until you get it right. if theres a better way don't hesitate to forget everything i've just said.
no. i open the file thingy to make the PS brushes PDN brushes but once i get the brush thing onto the program it says it has encounterd a problem and needs to close. Then it closes.