How is write protection removed from cd/dvd discs??

To add new files to a CD-rw or DVD-RW disk you have to reformat the disk and reburn the entire thing with the new files --- Which means erasing all of the contents that are on the disk so is not really the format you want -- what you are wanting is DVD-RAM which is a format similar to a HDD or USB drive where you can reuse the disk much like a HDD and write files to them and erase\add more files without rewritting the entire DVD.

There is a format called UDF that allows rewritable CDs to be treated like a hard disk. I don't think that Windows Vista supports this natively, so you would have to Google to find UDF software for Vista. Have a look at this article for a few more details.

Thank you very much - know what to do know.