Windows 8 On Mac Partition

So......I majorly messed up here and I'm hoping for some help on how to fix this. I had windows 7 already on my mac partitioned, then i did the upgrade to windows 8. It's copied everything twice and took up a lot of space so I went back into my OS drive, and uninstalled the partition, to create a brand new partition just on the windows 8..have all the windows 7 gone completely. Well...now I have a problem of having now idea how to get the windows 8 file, or an ISO image. I had digitally downloaded it, and do not have the CD. I'm basically wonder how I can now download the windows file while on my OSx partition, I do already have the flash drive and it properly formatted and everything. I've tried going into my email and running the downloader but...it won't even open on a mac, wondering if there is some sort of app or something I can do to get it to be able to open and download it onto my flash drive.

 

If you have the ISO have you tried using Bootcamp to run the installer?