Irrlicht Engine

How can I change the parent of a scene node to have no parent?
I tried ->setParent(0);
but then after that if i then try to change the parent again it crashes.

forgive my c++ ignorance, but if i then made a few nodes' materials = mynewmaterialwithallsettingsmade, and then changed a setting on mynewmaterialwithallsettingsmade, would that affect all the other nodes too?

If i create a new SMaterial class instance, how can I then apply it to a scene node? Without having to go through all the material's properties and 'copying' them over.
Like, there should be a .setMaterial(index,material) function .

thanks

ok, am i right to assume the dwarf and the axe textures are applied to the saved dwarf model already, before being loaded into irrlicht?
What if i wanted to change what texture was on the dwarf and what texture was on the axe programatically?

ok, how do i differentiate between the loaded meshes (buffer) in a mesh node. If there was more than one.

I don't understand.
The mesh in the buffer would be the dwarf mesh right?
Why would that mean more than one?
If the dwarf model has more than one texture, why does that mean it has more than one material?

By the way, blender fails to open the dwarf.x model.

don't you mean materials, not textures?

ok Is there an example somewhere of a node that is made up of multiple meshes? Or does one of the tutorials show that?

why does the getMaterial() function of a node require an index then?

How do i give a node a new material?
Is the max number of materials per node 4?
And why is it possible to load more than one texture into a material?

Can somebody explain to me how materials and textures work with eachother? In relation to 'per node'.
I understand there is a max 4 of one or the other. But are materials textures plus other settings, or what ?