Converting lightuserdata to self

[Christopher Eykamp <chris@...>]

I'm just going to apologize up front for my lack of eloquence on this 
question.  I understand what I need to know, but am not sure I can 
articulate it clearly.

I am developing a Lua event handling framework loosely based on the Lua 
Gems sample.  The main game is in C++, and I am tying them together with 
Lunar.  My problem is I need some way to pass a "self" object from C++ 
to my Lua code.  I can pass a lightuserdata, but since that is just a 
pointer, Lua can't do much with it besides call C++ functions.  I do not 
know how to get a real, operable Lua reference to my object.

What can I pass from C++ that Lua will see as a "self" type of object, 
and that, from within Lua, I can call Lua methods on?

Thanks!