how does one make an rso server

[gizmo gadget]

i tried using red5, mammoth, and a bunch of other flash media server alternatives but they were all not really what i was looking for, so the idea of trying to make my own crossed my mind... dont know where to begin so i figured id ask

i dont need a full media server, i only want to code a server that can handle flash remote shared objects.

i know i need to use rtmp

im not asking for anyone to code examples for me, im asking for any links to good resources. I understand that this is a big kinda broad question, so my fundamental question is this:

how do you receive and store remote shared objects from flash and how do you send a sync event and function call events back to the flash client

any help or helpful links would be awesome :)