I just left CS2suite on and installed CS 3 design as well. There are no conflicts between any of the versions apart from CS3 adopting all the associations. There are some plugin issues and interface problems with CS3 photoshop so I'd never lose CS2 just yet anyway.
(
Pasanonic 's been known to cause insanity in laboratory mice,
Mon 23 Jul 2007, 19:26,
archived)