changing animaton

Blender ver:2.56
problem with animations solved
i get it now, i have to deactivate previously activated actuator
still, i have a few questions:
where is option “All edges” ?
where can i enable glsl shading ?

final script:

import bge
cont = bge.logic.getCurrentController()
own = cont.owner

senList = own.sensors
actList = own.actuators

if senList["upArrow"].positive:
    cont.deactivate(actList["ani_idle"])
    cont.activate(actList["ani_walk"])
else:
    cont.deactivate(actList["ani_walk"])
    cont.activate(actList["ani_idle"])

The glsl shading is selected by clicking by choosing Game from the top menu.