pacific poker bonus

lot of ppl play pacific because of the free bankroll when u depsoit 400 to receive the 100 dollar bonus. Mnay withdrw the 400 immmediately and get to play with the 100 dollars risk free. Of course, it is almmost impossible clearing the bonus at pacific with 100 dollars since u will go broke trying to play 5-10 limit since u dont have the roll for it. I recnetly went up then down. now i m at at 150 dollars. Can i withdraw say 45 dollars to 50 dollars since i will still have that 100 dollars there which is not mine. I know that if i withdraw everyting, i will most likely lose everythign maybe except the 50 i try to withdraw. Can i withdraw the 50 because i want to make some sort of money there and dont wanna withdraw everyting since i enjoy the site a little.