Flames texture position

I have a prim box (created by Linden) that has an animated flame with the code below. When I try to find the texture in the edit it says that it is multiple textures, but i cant see where it is in-world. How do I get the texture into my inventory so to use somewhere else? The prim has full perms.

default
{
state_entry()
{
llSetTextureAnim (ANIM_ON | LOOP, ALL_SIDES, 4, 4, 0, 0, 15.0);
}
}

just because a prim has full permissions doesn't mean the texture applied does
you can try choosing a specific side and see if the texture can be taken off the prim
(I think the choice is select texture which lets you select specific faces of the prim)

otherwise, for the flame texture, check the library folder see if there is one in there