Thanks, everyone for answering.
Other issues: I tried using Winimage, but I get an error message when trying to write the .img file. I'm entering WinImage in Administrator mode, but I still get the error.
I also have Win32DiskImager which I will try, if I continue to be unable to use WinImage.
I'll give it another try, but I'm just about ready to buy that nook card since I'm having so much difficulty....or else a Samsung Galaxy tablet.
Don