I have been put in charge of maintaining an old PBX system which is running Windows Server 2003 and TeleAdvantage PBX software. The big concern is that the company that originally built this PBX box is out of business and we have no way to simply re-install this software. I'm looking for the best method to back up this machine and ensure we can restore it if something like the motherboard dies and we have to restore it on a new machine. I've used Norton Ghost before, but I know that it that the image, when restored on a completely different system, doesn't work. When we tried it, the system simply booted to a Blue Screen. This system relies on a couple add-in cards for T1 service and POTS. Each card is about $2000-4000, but we have a supplier at least to replace them. We just don't have a supplier to replace the software.
EDIT: Another issue I am concerned about is Windows Server activation on the replacement hardware. I'm never had to restore Windows Server like this and am not sure what to expect.