Imaging a Win2003 server, need advice!

I'm considering imaging a Win2003 server and installing the image to run on different hardware. I've imaged a regular PC with Clonezilla, but never a server. I have a dying 2003 server I need to keep operating for the near future. The on board NIC and raid controller have failed on this machine. I installed PCI cards for both and got those services back up. It is a backup controller on our 2008 domain, but most importantly it runs our very antiquated accounting software. The accounting app will not run on anything higher than 2003 and XP. I have access to similar but newer hardware and in much better shape that I'd like to install the image on.
Any advice, pointers, references or words of encouragement would be greatly appreciated! Thanks!