[Skins] Bump & Specular & Diffuse Illum

[metoxys]

I'd like to have a feature to enable using bump textures on normal car / gun / whatever skins
Now they are only enabled in the Stadium environment but it would be awesome to use bump on skins

EDIT: For everyone who doesn't know what bump is:
http://en.wikipedia.org/wiki/Bump_mapping

EDIT2:
Also including Normal maps and Specular maps

EDIT3:
Also make the possibility to apply an Illum.dds to the Diffuse.
Maybe call it DiffuseL.dds or something like that.

It should be made that all those things are optional so the model should also work without that.