To install this file place it in ~/.vim/syntax (*nix/Mac) or in $VIMRUNTIME/syntax on Windows or just use NeoBundle, Pathogen or Vundle, and than issue command:
:set filetype=kickass
You can also add to your vimrc file autocommand:
autocmd BufRead *.asm set filetype=kickass
From now on, all files with extension 'asm' will have brand new kickass syntax.