[ubuntu] Putting an image on ubuntu

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http://ubuntuforums.org – I have installed ubuntu on my laptop and i was wondering if i were to re-partition the hard drive so i could put my windows 7 image on the hard drive if it would create any problems anyone knows of? the image was made when it was just windows 7 only so i dont know if it will mess grub or the boot up. has anyone tried this? (Hardware)