What is the Best Way to Back Up Entire Dual Boot HDD including two OS ?

Hi,

I would like to back up my whole Hard Disk including OS & all partitions few times a day everyday so that if something goes wrong I should have another Hard Disk Ready To Go in matter of few minutes without having to do anything.

I have been doing this with a software called XACT Copy that makes an exact copy of the whole hard disk on a slave drive with OS & all the settings & programs & all the data. In case something goes wrong with one drive I can just replace it with a second drive in less than a minute by connecting the second drive.

The only problem with that software is that it works only with Windows XP & not Windows Vista.

But now am switching to dual boot system with Win XP on C drive & Windows Vista (Ultimate) on the next drive to learn Vista before I switch completely to Vista as my main OS.

Can you guys tell me how do I achieve my above objective ?

Raid -1 is not a good alternative because if Virus is caught it will corrupt both drives and I am not sure if Raid-1 will work with Dual Boot system.

Please help me.

Thank You Very Much.