Yeah, seems like somebody at Adobe made a stupid move. Not sure why they can't just attach people's code to their account? I've got a copy of Carrara 5 Pro, it's no longer supported by Daz3D and I can't get a hold of a download as they don't have it on their site as it's an old copy, but I've still got the disk and my registration code is still tied to my account. I am sure Adobe could have offered those downloads without the serial numbers, seems they made it waaaaaay too easy to be abused or misinterpreted.
Shame, I was looking forward to using Photoshop CS 2 as I am planning on buying a Wacom tablet soon, ah well, I picked up Art Rage Studio Pro in the Steam sale, so I'll prolly just end up playing with that instead.