Erm...trying not to sound offensive, I think you are being dumb.
I take it by blank CD, you are talking about one that you wish to wirte stuff to. If you insert a blank CD into your standard drive, the computer will ask you if you wants it formatting - on a PC or a Mac. That's because blank CD's aren't formatted. Non-formatted means can't read. My machine did the same thing - until toast was installed.
Open the toast program and select file that you want copying onto CD. Then insert the blank CD into the CD writer. The formatting dialog shouldn't come up. Then burn.
Hope this helps