you guys are half right.
regular files such as documents, avis, jpg pr0n collections etc, use Mode1 when a cd is written. right now the industry standard is 700megs and with a bit of overburning you can usually extend that to a few extra megs but like the above posts said...not too far otherwise it corrupts data. if that d3beta is in fact a disc image it may very well be able to be written. image files such as bin and others use Mode2 for writing. this is the same with audio and video cds. and i wont go in to the tech of it but allow sizes of up around 800-850megs on a 80min cd. so even with a 873meg image it may work... but that is getting rather large. use binchunker or ultraISO to remove any unessesary files from the image and then try and bun it. may have a better outcome...