The Distributed Application Designer is not currently supported with the 64-bit version of the System Center Operations Manager ...

The Distributed Application Designer is not currently supported with the 64-bit version of the System Center Operations Manager 2007 Console.  Suggestions: Dual boot to a 32-bit version of Windows and run the Distributed Applicaiton Designer from there. Run the Distributed Application Designer from another computer that is running a 32-bit version of Windows. Use Virtual PC to install a 32-bit version of Windows and the product UI.