I don't know what kind of openness you expected from Caanoo. It runs Linux and allows/encourages people to develop for it (afterall, it's largely third party software that has been selling GPH devices, although there are more games in the pipe for Caanoo), but that doesn't mean that GPH subscribes to what people consider open ideology for everything they do. You won't find schematics or source code for their menus or anything like that.
The "Caanoo OS" is standard ARM EABI Linux. Why do you want to be able to able to emulate this so badly?