separating percussion parts into 3 players.

i am composing a piece for 3 players. I want each player to have two unpitched percussion parts, e.g. two hand claps or a clap and a stamp. The problem is, when i input the instruments they all come linked together by the beginning line. I am unable to split the instruments into their separate players. I am able to put brackets, of course, however if i want each player to have a different time signature, musescore only lets me have all the parts as the same time signature, it does not allow me to have different time signatures for each player.