Thanks muchly!, Angus
If I find out anything I let you know.
Flip is actually easier then 3D. You just need to interlace two pictures and then combine them. My guess is you can treat the two pictures as the assets for 3D and let CS4 do the interlacing for you if it can do that.
In case you need to have print them, I found this company does a great job, www.newcyberian.com. This is a dvd duplication company but they also do lenticular printing for the DVD slip covers.
Cheers, Angus