XP can write data to CD-RW, but not directly from NTBackup. However, you can
place backup files in the XP CD-RW write subsystem's spooler, which
effectively writes the data directly to CD-RW. To add files to the spooler,
perform the following steps:
1.. Start NTBackup (go to Start, Programs, Accessories, System Tools, and
click Backup).
2.. Select the Backup tab.
3.. Select the files that you want to back up to CD-RW.
4.. Select File for the type of "Backup destination."
5.. Enter the following file location:
C:\documents and settings\<user name>\Local Settings\
Application Data\Microsoft\CD Burning\Backup.bkf
If you aren't sure what the <user name> variable needs to be, go to a
command prompt and type
echo %userprofile% to check your %userprofile% environment setting.
6.. After you specify the location of your files in the CD-RW cache,
right-click the "CD write" icon in Windows Explorer and select "Write these
files to CD" to write the backup files to CD-RW.
Make sure the size of your backup doesn't exceed the capacity of your
storage media.
http://www.xtremepccentral.com/forums/archive/39/2002/03/3/786
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Best, Ramesh