CTOS/BTOS recovery

Hi. I recently picked up some more Convergent machines at a thrift shop. I was pretty amazed; my 186 model was the only one I'd ever seen. Now I've got 286 and 386 models. Wow! Anyway, I also picked up a few disk modules. Two 85 MB modules, I think. (compare to my existing pair of 10 MB modules...) One is an 'expansion' and needs to be connected to another disk module to work. My problem is this: the one disk that has CTOS installed was set up as a 'Cluster Controller' and actually has accounts and passwords set up. I can just press 'Go' at the login on my CM001 and use the system. This doesn't work on the new system. Is there a way I can recover the files on this disk (meaning the OS and application software)? I have OS disks for the standalone version, but I'd like to preserve the cluster controller so starting over is a less-than-ideal option. I do have other working systems and parts available to press into service for the cause. Thoughts, hints, suggestions? ok r.