I'm currently using WinXP Pro SP3 (x86) and using CDBurnerXP. My optical drive is Lite-On iHAP222 IDE DVD-RAM. It's a DVD Multi Recorder drive, labeled for DVD+R DL and RW discs. The .iso file is 4.64GB and CDBurnerXP won't burn it because it won't fit the disc, which is labeled as 4.7GB capacity.
Google search gave tons of results that say it's something to do with discs being labeled 4.7GB in the sense of 1GB = 1,000MB whereas 1GB really is 1024MB. The .iso file I'm trying to burn is an OS... so it's supposed to fit a standard DVD+/- R disc. I don't know anything about overburn (never tried such feature before) but still risked it and got same error saying the disc doesn't have enough space.
The discs I use are TDK 1-16x 4.7GB DVD+R and never before seen such an error come up with .iso files this large.
Sorry if I posted this in the wrong place, it seemed the most relevant here but maybe I'm wrong.