I downloaded CDburnerXP but am curious about something.  It uses the "MASTERED" file system to burn disks.  So, if I use CDburnerXP to burn an RW DISK, how can I erase the RW disk later, if I NEED to???   If I'm not mistaken, "mastered" files cannot be erased.   

How did people MANAGE to erase RW disks before the "live file system" came out??

I erase them all the time and it has a tool to do so.
Just did one yesterday as a matter of fact.Follow this link and see what a microsoft website says about "mastered" disks.. They say it isn't possible to erase mastered disks.  (when you get to the site, click on the note that says "Why are there two different ways to format a disk?")

http://windowshelp.microsoft.com/Windows/en-US/help/2fa35b0d-b280-4589-9805-55e753888f5c1033.mspx#EI


On the other hand, here we are, and you say you have sucessfully erased a "mastered" disk.  What am I MISSING here???I'm not sure what you or MS means by "mastered" here...
The file system choices are listed in the drop down menu labeled Disk in CDBurnerXPro.Isn't the "live file system" as new thing that came out with Vista?  Since CDburnerXP was made before Vista came out I assume it uses the "mastered" file system format.

...and sinse "mastered" disks cannot be erased, according to Microsoft, I'm just wondering how people managed to erase RW disks that been been formated with the "mastered" file system.   

So, if someone were to say, "RW disks cannot be erased if they have used a "mastered" format", that would obviously be an inncorrect statement because you just said that you did it yesterday.....   I'm not too good with optical disks and I'm trying to get to the bottom of all this...