Whats the deal with the IMG format (not a noob!)

oK ive been in the dvdr scene now for 2 years, own 1.5 TB of hardrives holding all dvdrs and have never gotten a clear answer to my question.

What is the IMG format? which program makes it? I know decrypter doesnt but yet is the only program that will burn it.

are there any other programs that will burn them, decrypter is great but sometimes gets annoying. I prefer nero but you have to rename the file which makes me nervous.

so i guess i dont get why an image fomat that is so little supported gets used so much.

I have scoured all of our major sites and see noithing written about this format.

thanks for any info!

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