ghost

…after spending three full days to recover what ever I can, I learned my lesson. Rather than backing up only my files, documents etc., I would like to buy a second external or internal harddisk, same size (120G), and just ghost (shadow) the boot drive to it. Is it possible? Is there a uility for this? If not, (I know there are many ways to do backups), what is the easiest and best way to do backups? I could not make Norton’s Ghost to recognize more than 4GB and they have no support but referring you to their manual which is not very good.
Any recommendation will be appreciated.
thank you