In order for the cat to run in fpsc it needs to have the order of the way that fpsc reads the animations. Put this at the bottom of you fpe and you should be able to run the cat with any of the scripts in fpsc. Try the swarm claw script, the roving guard or my deer script.
;animationinfo
animmax = 100
anim0 = 0,38
anim1 = 39,119
anim2 = 196,226
anim3 =
anim4 =
anim5 = 227,246
anim6 = 120,195
What I did here was place it so that if you use say the default pace script you should see the cat jumping, but it will walk, run and all that other happy stuff. Also if you want psionic did a cat as well and it was free
here.