I was talking about CD-R's. I know that a blank disc costs less than a postage stamp, but I still hate to waste one. For instance, I make disks which are playable in both DVD players and PC's. That is, they are VCD's but have extra files on them which can be played by a PC.
The other day, I wrote such a disk, but accidentally left off one measly file. The whole disk was wasted. I wished I could just tack on one extra file.
Look at it this way. If I buy a region 1 DVD, and take it to Europe, it won't play in my region 2 player. The rules tell me it can't be done. But I know that I can hack my player so that it ignores the region code and plays my disk. I'm asking if there's anything similar in CD land, that would let me add one more file to an already finalized CD. If NASA needed to do it to save five stranded astronauts, it would happen. I'm asking if anyone has done it without spending more than the GDP of Guyana.