You're wrong. The first reply to your message was your answer: "DISC AT ONCE"

I never bothered to change any of the settings in Nero, but I suppose the following are most optimal in preventing a coaster:

CD-ROM (ISO) ---> No Multisession

Ignore everything in File Options

Burn - Check: Write, Finalize CD and DAO

Keep everything else the way it was.

guys im having the same problem. ive got all the settings like you have said in nero. disk at once and i havent touched anything else. im tryin to burn CapcomVsSnk 2 and the file is 705mb. it keeps telling me that the disk size is too small. help someone!!!