hi S.. my son is 6 and a half. i had the same problem. my son used to have accidents all the time while playing, watching tv, and sleeping. i used to tell him that if he couldn't pause the movie to go to the bathroom, then i would have to cut movie time shorter. for a few weeks i only permitted him to watch half the movie until he went potty. eventually i let the movie go longer and longer until he got to watch the whole thing. every night i reminded him that if decided that the movie was more important than being a "big boy", the movie would be cut shorter again. it worked. as for the wetting the bed, my son just stopped doing it this summer. i spoke to his doctor about it and he said not to really worry about it. he said that a lot of children can't control their bladder while sleeping until the age of seven. he said not to worry about it until the seventh birthday, but usually, once they hit seven it just stops. also, since i was tired of changing his bed everyday, i made him do it. before he went to school, i had him take off the sheet, and then i had him put on a clean one (i had to help him some, but he got the idea). another thought might be that maybe your daughter is a bit jealous of the new baby. maybe she feels that wetting herself is the only way to get to pay attention to her. try giving her extra praise when she does go to the potty. keep me posted on the progress. good luck.
S.