Adding vertices and fixing bone assignment

[Shenzai]

I really need to know how to add vertices to my mesh.
And after doing that, I'll have to fix bone assignment, but I also don't know how to do it.

I think I have seen a tutorial about that here, but it was before doing the first meshing tut, so I didn't pay attention. Now I can't find it anymore. :(

[fakepeeps7]

You can divide faces to add some vertices. It depends on where on the mesh you want those vertices; some areas will be easier than others.

[Shenzai]

Thank you! I select the faces and 'subdivide 4', right?
Now I just need to know how to fix bone assignment...

[fakepeeps7]

Bone tool.