A goof project, but where is the code for downloading? Everywhere where is written "Code" or "Browse Code" it's empty and nothing for downloading.
This is what is says exacly on the website. A fork of remastersys or better Remastersys itself. for now the remastersys package for x64 systems has a little deppendecies issue. So you can't install it trough the software center. You have t o do ist by hand with dpkg - i <packagename> and then ran apt-get install -f to fix the issue. For this time ther is not moe to say here because there is no difference between remastersys and os4systemimage yet.