Are you wanting a VI that emulates a RS filp flop, or do you have a question about using an actual one?
You can make a RS flip flop by knowing the 4 states:
R=0, S=0, Q=no change
R=0, S=1, Q=1
R=1, S=0, Q=0
R=1, S=1, Q=?(invalid condition)
I have attached a RS flip flop VI in LV version 6.0
dhuff