On the surface it is saying that you are logged-in as a normal user, without
sufficient administrative rights to install software.
If this is a home PC, then login as the PC's administrator and re-try the
installation.
If this is a corporate PC, then contact your IT group.
As for the usefulness of GHOST, I have had very good luck with it since the
days of windows 98. I own a license for GHOST 2003, but actually prefer
version 2002, the same one you have with System Works 2002.
However, be aware that GHOST 2002 has some limitations. It makes complete
images of partitions or disks. It does not make incremental backups. It
must be run from a DOS floppy, which it makes for you. But, it provided a
free version of DOS, not MS DOS. If you want/need MSDOS, you must provide
it. Of course, if you are running 98, ME, or even XP you actually have MS
DOS available. (In XP it is obtained by making a bootable floppy, which is
really ME, not XP.)
Because GHOST 2002 is DOS-based, it does not recognize USB or firewire.
GHOST 2003 tried to fix that, but in my opinion failed to do so reliably.
Also, GHOST 2002 can only save to disks that support FAT32 (or FAT16). It
can not save to NTFS parttions, although it can backup an NTFS partition to
a FAT32 partition. GHOST 2002 can write to CD-Rs, and has some networking
abilities.
Note that GHOST 9 (and the recently released GHOST 10) are based on the
DriveImage program, formerly by PowerQuest, which was bought by Symantec.
This program can do more than GHOST 2003 and earlier.
An alternative to GHOST is Acronis True Image, which can write to USB and
firewire and NTFS. It is simpler to use than GHOST, although it has les
ell&whistles for those you like such things. Its main weakness is that its
recovery CD uses LINUX and if you have a very new motherboard the required
drivers for your disk controller may not yet be available in LINUX flavor.
However, Acronis support is pretty good about adding drivers every month or
so. This is primarily an issue with RAID, SCSI, or SATA disk controllers.
Plain old IDE disk controllers do not appear to be an issue.
For a long list of backup programs (some free), go to
http://www.majorgeeks.com and click the "back up" link on the left side of
the page.