I use both 32 bit and 64 bit versions of Cubase.
64 bit for music and loading big sample libraries into the 8 gigs of RAM in my machine.
32 bit for sound design and working to video for plugin and video compatability and performance.
Only annoying thing being the preferences and keyboard shortcuts and the like are kept separate from each other - keyboard shortcuts being the most annoying one - I’ll set up something useful in one to find it not working in the other.
Is there a way I can sync the two, even if it just means copying and replacing some files now and then?