I downloaded an ISO image and I going to use BurnAware Premium to burn it to a CD. It's only 140 MB in size. The same option is available in BurnAware Free.
BurnAware Free - www.buraware.com
Open BurnAware and click on the Burn ISO button.
In the window that opens, use the Browse button to find your ISO image or just drag and drop the ISO to this window. Then click on the big red Burn button. CD/DVD ejects when finished.
That's it. What's your favourite burning software?