Best practices on bundles, in 32bit and 64 bit environment.

Are there best practices when setting up bundles in a mixed architecture environment? I'm working a universal image for Windows 7, and was just testing some apps. The whole Program Files (x86) seems to be the problem. I have created a few in the past (we have maybe 5 Windows 7 machines running already) and I've just edited the Actions, Launch, and added another Launch Executable section, gave them the appropriate architecture requirement, fail the action if these requirements fail, and the continue on failure. I have noticed this makes alot of entries in event viewer. Should I just make a copy of the bundle and make changes for 64 bit and give the app in general a requirement? If so, are there command lines to give all existing bundles a 32bit requirement?

I am running Zenworks 11 SP2 btw.