First I want to thanks for your help and advices , we have finish make gentoo stage3 and it will be tests by our community. 

      Now I  am working for  gentoo LiveCD using stage3 .   After searching gentoo website, I can not find a very clearly method to make gentoo LiveCD . 

      So ,if conveniently , could you give me some advices or some websites which cover the methods to LiveCD of other arch(e.g : x86 ,amd64 etc..)

      Thanks very much ~   :-)