Process Explorer did the trick. During the last part of the installation I got a dialog box that had a red X in it and an OK button. There was no text. This dialog box popped up twice during the in ...
Turns out it was ResrcMon.exe causing a conflict. Stopping the Cluster service on the inactive node eliminated the conflict and allowed the CSD to be installed.
I'm attempting to install WebSphere MQ refresh pack 6.0.1.0 on a Windows 2003 active\passive cluster. Node 1 is the active node and Node 2 is the passive node. Here's the steps I'm taking: