The NTBackup program is not installed on XP Home for a reason and that is
because it is a POS. Most home users will be wanting to backup to an optical
drive like a CD-R/W or DVDRW and the NTBackup does not have that ability. It
is really designed for creating backups to tape drives or a second hard
drive. While it is true that retail copies of the XP Home CD contain the app
in the ValueAdd directory and that it can be install manually you will find
that the version that ships with XP Home is further stripped down to not
enable an ASR or full system backup. If you want to do a decent backup job
get yourself a third party solution. There are plenty of low cost and even
free file backup programs available that are far superior to NTBackup.