I just downloaded a new version of Windows Server 2008 R2 64-bit and to my dismay, Dreamspark shells the image out as a .img file instead of the typical and beloved .iso. I looked online to find out what the heck to do with the .img file and found a bunch of sites explaining how to run a command line program (VBoxManage) to convert the .img into a .vdi. The conversion went well but the .vdi did not work when I tried to mount and start the VM to boot to it.
To my delight, I then tried renaming the .img to have an extension of .iso and SNAP! It works. Mounted up the .iso in typical fashion and Server 2008 is now running on my MacBook Pro. I understand Ubuntu is handing out .img files instead of .iso as well. Must be some better compression value or the like (the Server 2008 R2 Standard/Enterprise/Web/Datacenter all in one was only 3GB).
The UX Dev Guy 
Comments on: "Mounting IMG File with VirtualBox" (17)
Thanks I was pounding my head on the desk trying to get the img to work.
No problem! I just had the same thing happen with .3gp file to .mp4 conversion. I tried a bunch of different free trials of converters, and finally realized just renaming the file works just fine for both iMovie and YouTube! Have a great weekend!
Thank you, been wasting my brains off to get that thing working !
saved me a buncha time!
Thanks for the tip
It didn’t work for me 😦
What IMG are you trying to use? What is it doing?
KK, are you using the Windows to do it? Because I tried to do it through Windows, and it really didn’t work, however, through Ubuntu it was done. Thanks Zach!
Thanks for the info bro, too bad it took me almost 2 hours to run into your site, but it worked, and for that I’m thankful.
Really useful… thanks!
Old posts FTW. you just saved me so much time. Thanks
Excellent. Its works immiediatly.
Ubuntu gives out .iso’s forever by default however you can get the .img at releases.ubuntu.com
Awesome!!!
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If this works, I’m gonna give u a hug! 🙂
+1. Kudos to you sir