This is the first public release it is still unstable, so don't get your hopes to high.
Read the Release Notes that comes with the installer for exact details.
One more thing, this installer is kinda of crappy, since this is my first time working with NSIS a scriptable installer. If anyone is an expert in creating one, and you would like to contribute to this project then join us. Remember to download latest stable release of NASM and MinGW and setup environment variables a tutorial will be posted in the Documentation soon.