To burn an ISO in ImgBurn do the following.
- Open ImgBurn.
- Click the 'Write image file to disc' icon.
- Put a blank disc in your burner.
- Select the ISO you want to burn.
- Click the 'Write' button.
And that's all there is to it which is one of the reasons why ImgBurn is so popular as it's very simple to use.
By 'fast action' I mean rapidly moving video such as car chase scenes, explosions, close ups of rapidly moving water etc.
Most of that guide is just an explanation of why you're doing what you need to do.
The short bit at the end is the actual meat of things and it's only a few steps long.