Once you download the image, run Disk Utility. Go to the file menu and Open Disk Image. Find the image where you downloaded it (by default, in your downloads folder), and open it. In the main pane, select the disk image you just loaded (you may see two related ones, and you want the one at the top of the directory tree). Assuming you've already inserted a blank CD or DVD, hit the burn button and then the burn button in the resulting window.
No idea about VIM. Honestly, it seems incredibly dangerous to me - even if the driver claims it is just for the benefit of his passengers. It's awfully hard to avoid looking at a video screen when one is in front of you, no matter how hard you try. Furthermore, it is illegal in most states. But to each his own.
More detailed instructions here. Good luck!