Change the default animation

Hi guys, Well it’s about a long time that i’m trying to find a way for changing the default animation.
Atleast i’m using the SideScroller 3D Template and developping on it.
So i want to change this animation to another, i mean an animation of carrying weapon. I do have the Animation starter Pack aswell.
And dont change anything else ! Just that and atleast i’m locked …

Thanks guys ! See you !