Custom Block Creation?

[Lokiare]

Is there a way to make a custom block/item in a plugin without having to edit the servers ini files?

I want it to be self contained in the plugin for when I distribute it.

I need to know how to make a custom Item that I can access just using the name/item number to create cItems.

I need to know how to add the artwork and the 3D object, etc...etc...

thanks for any help.