Sysprep or Systrash?

I spent much of yesterday and today readying a new disk image with Windows XP Pro on it for our faculty that have Dell Optiplex GX 150 machines.  I got it all done, and ran sysprep (Microsoft's tool that resets the PNP data, machine name, and SID) in preparation of making the disk image.  Tom, my co-worker, then asked me if I'd remembered to install the new OpenManage stuff we're going to deploy.  I hadn't, so I fired the machine back up, only to discover that Sysprep has wiped out about two days of work.  Well, back to square one.  This time, I'll make a preliminary disk image BEFORE I sysprep that thing...