Question [Q] Android ICS 403 Custom ROM in Andriod Emulator

I am trying to flash the emulator with a custom ROM image I have build. Its based on ICS 403.
I have no luck what so ever. Also did a search to find something on the Web, nothing at all. The only method I found is to copy the "system.img" in the AVD folder(Virtual Device one just created by the developer), that not working either.

Can someone please help?

Thanks a lot