Using CDRWin: How to overburn an ISO image?

[OCNewbie]

I'm trying to burn a 707 meg .avi file to a CDR disk. The disk is a 700 meg/80 min CDR. I'm using a Plextor 12x10x32x IDE drive. Doesn't CDRWin support overburning? Or is that only when creating an audio CD? When using the "File Backup and Tools" part of CDRWin, I use the option "Write ISO Image to CD on the fly"(not the exact term). Anyway, it doesn't seem to let me burn anything over like 702.5 megs or so to a CDR, therefore not allowing me to overburn. Gives me this "Error: ISO9660 Image is too large to fit on disc". I'm pretty sure this "should" be do-able, it's just a (annoying)safe-guard of CDRWin I guess. Is there anyway to over-ride this? Or must I use Nero or something like that? (I've been using CDRWin so long I'd rather not swtich, and I'm not crazy for Nero). Any help or comments appreciated, thanks.