Í have been working on the VMM 2008 the last couple of months. One thing I have found the hard way is when you run the "Configure Operations Manager" part on the RMS server you need to do this with a account in the same domain as your server. We have admin accounts in another domain (but in the same AD with full trust), if I use this account I get an error message about setting SPN for the VMM service. The only way to fix this(What I have found at least) is to create a Ops Mgr Admin account in the same domain as your RMS server and run the installation with this. Then the process just runs smooth.
