I have an Exchange 5.5 running on a Windows NT Server 4.0. The machine
does not have RAID disks I really need a BACKUP of all exchange data.

I've read that backuping only the Exchange data files (mdbdata) will
not do the job, because without all SSIDs and all domain information
from NT, I wont be able to restore exchange.

Backuping the whole system (like an image) is not an option. I don't
have that kind of space.

Now my questions :

1) There's any way to "open" the mdbdata in another exchange server?
(ReadOnly is needed)

2) There's any way to backup the exchange and after a clean reinstall
(nt and exchange) I could restore the data back?

3) There's any way to backup NT domain information without having a BDC?