Restoring Active Directory to a different server with Veritas Backup Exec 9.1

I have a 70 PC network with a single 2003 standard server which runs everything (AD domain controller, DNS, DHCP, Exchange 2003, file server, fax server). We use Veritas Backup Exec 9.1 (with open file option and exchange agent) to perform a full tape backup every night.

I am not happy with our setup as I believe we are vulnerbale to considerable downtime in the event of hardware failure. At present I am trying to make the case for adding a second domain controller. In my report, I would like to outline just what we would have to do at present to get up and running again if the server died. As I see it, the steps are as follows:

1. Repair the hardware fault.
2. Reinstall Windows.
3. Reinstall Backup Exec
4. Restore from the tape.

Now on to my question....

My server is a Dell Powerdege 6650. I still have our previous server (a Poweredge 4400) on which I have installed 2003 server. In the event of the 6650 suffering a serious problem, is there anyway I could use my tape to restore on to the 4400?

I know that getting back the files and some of the apps wouldn't be a problem. It is what can be done with Active Directory that I am not sure about. From what I can see, AD is included in the Shadow Copy Components of Backup Exec 9.1. This seems to be an all or nothing selection so that if I tried to restore this to a differnet server it would include registry entries realting to the specific hardware configuration of the 6650.

Has anybody had any experience of restoring a full system state backup to a different server. Or does anybody know a better way of restoring active directory to a different server?

Hope you can help

Cheers

Andy