How to implement a Cocoa-based Adobe Photoshop plugin

Question

Cocoa used to work on CS3 with the trick of putting a Cocoa bundle inside the main Carbon plugin bundle, loading it from Carbon and issuing a NSApplicationLoad(). That\'s becaus

Answer 1

CS2 will load PowerPC Mach-O code as readily as CS3/CS4. Has anyone tested this Cocoa approach in CS2?

Currently I use Carbon for CS2/CS3/CS4 as this is guaranteed to work everywhere the plugin loads; and Cocoa for CS5 of course, whether 32 or 64 bit.

Chris Cox isn't optimistic about Cocoa working in anything other than CS5: http://forums.adobe.com/message/3256555#3256555

So what's the real deal here? It's pretty hard to ignore advice from the horse's mouth.