The script uses matchadd() which requires Vim 7.2 (actually version 7.1.040 or later). You will probably need gvim to display the colors specified in the script. In addition, the script assumes you have a numeric keypad and a system that allows you to map keys on that keypad (for example, the command :map :echo 'Hello' would display Hello when you press 0 on the numeric keypad). You need the script (highlights.vim) and the file that defines the highlight groups (highlights.csv); these are given below.