Free dvd burner for windows 7?

I use Imgburn (it seems popular with others), there are others Just google "free DVD buring Programs" for others
http://www.imgburn.com/index.php?act=download

What you need is a program that is capable of adjusting the bit rate to fit more on the same dvd. In other words if you have a 5 gb file and need to put it on a standard 4.7 gb disk which only holds about 4.3 gb it needs to be made to fit by reducing the quality.
DVD Flick is a free burning program that can do this, download all required components from.
http://www.dvdflick.net/download.php

+1 for all above programs. I use all three and they each have their downfalls and strengths.