http://blogs.technet.com/smsandmom/archive/2008/07/22/opsmgr-2007-the-operations-manager-32-bit-agent-is-supported-on-64-bit-operating-systems.aspx
How to move the SCOM database: http://technet.microsoft.com/en-us/library/cc540384.aspx
How to move the datawarehouse: http://technet.microsoft.com/en-us/library/cc540368.aspx
Other useful SCOM procedures: http://technet.microsoft.com/en-us/library/cc540402.aspx
Moving the SCCM database: http://technet.microsoft.com/en-us/library/bb680707.aspx and http://technet.microsoft.com/en-us/library/bb632383.aspx
The process always comes up so here is the link http://technet.microsoft.com/en-us/library/bb633121.aspx