burning NRG files over 700 megs

I'm noticing now that the games im downloading are CDI files that are over 700 megs. Since my burner can't use Disc Juggler, i'm using cdi2nero to convert them to NRG files. Problem is that the NRG file is over 700 megs and I can't burn them onto a 80min/700MB CD. Is there a way to strip down the file or another way that I can burn these games? I've looked in this forum but I can't find anything on this problem. Any help is appreciated.