Hi,
I may be way of the mark here, but shouldn't you be considering implementing full and proper disaster recovery plan. Creating an image of a server is far from standard procedure, I guess it would be a nice second or third line part of a disaster recovery strategy, but the most important point here is to get a backup procedure in place, with system state and data backups.
A ghost image is just as vulnerable to data loss as a standard server with no backup or image at all, remember, you have to store the ghost image somewhere, and there is always the possibility that the image can become corrupt or worse still destroyed if a disk failure occurs in the storage location.
Another symantec product, Backup Exec, would do the trick nicely. As far as I can see, it's one of the best pieces of kit I have ever used. Although complex and tricky to configure at times, it will give you the redundancy that you require, with mulitple avenues to explore in terms of backing up to disk, robotic libraries or flushing to tape.
I would strongly recommend you invest in some proper backup software and media, and get yourself protected!
Remember, if the network goes down, and you lose data, you're responsible.
I hope you heed the advice.
Many Thanks