I use CDBurnerXP I have had it for a couple of years now. It is a free application to burn CDs and DVDs, including Blu-Ray and HD-DVDs. It also includes the feature to burn and create ISOs.
I downloaded it from click here
saved the file to my 'Downloaded progs' and then installed it.
You can use it on Operating Systems: Windows 2000/XP/2003 Server/Vista/2008/Win7 (x86 / x64)