Well, I just need a little suggestion. Lets say I'm creating a name space "tools". I want to have sections in tools, like "tools.file.{other functions here}" . I was just wondering what's a good way to add categories to my name space? should I make them all classes, modules, or what?

something like this:
Namespace Tools
Class File
......some functions here.......
End Class

Class Graphics
........some functions here.......
End Class
End Namespace