Installing Visual Studio 2005 Professional Edition 90 Day Trial

[Icyculyr]

I had no idea what forum I should post this in, but im really stumped, I found a 90-day trial for the Visual Studio Profession Edition, however it downloads as a .img file, I read the addition information on the download page, and it said this:
(The link is below)

An ISO-13346 image file is an exact representation of the original installation media, including the content and the logical format. The most common use of an image file is to write it to a blank DVD-R resulting in an identical copy of the original DVD including file name and volume label information. ISO Images can also be extracted directly to a file location by many DVD-R utilities.

I have used Nero StartSmart to burn it to a DVD-R and nothing happens? I am quite confused, everytime I click to open the .img file (from disc or from desktop) it says 'To install this program, windows needs to know what program created it' etc... I tried that, with no help
I am quite confused and would really appreciate anyone telling me what I can do, I looked on the microsoft forums, and they had nothing for help for installing it...

The link for it is here: The Link

It is a couple of lines down, and it is called 'Visual Studio 2005 Professional Edition 90-Day Trial', I have not been able to figure out how to install it