Please have a look at these wiki links first:http://www.chakra-linux.org/wiki/index.php/Packaginghttp://www.chakra-linux.org/wiki/index. … uildsystemIf you still have questions feel free to ask again.
Hello and welcome to Chakra! To answer no4, no you don't need to overwrite anything with new versions. Chakra is a (half) rolling distribution, so a "sudo pacman -Syu" will always keep you updated with the latest packages.