By not closing the CD, I'm guessing that it's defaulting to making multisession CDs. Where if you don't have enough to fill a CD now, you can add more later in another session. Older drives had problems reading multisession CDs, and making multiple sessions really wastes space on the disc.Though on the subject of Read-Only files, I noticed that in XP they finally fixed the problem with copying files from a CD. In previous versions of Windows, it would keep the Read-Only flag on, then you would have to go back through and clear it for all the files you copied.
I'll still stick with Nero.
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When 1337 hax0rs start impaling each other with swords and typing code with a hook on one hand, then they can modify the term "pirate."