Martin an author wrote:
…I also suspect that the trial version of Photoshop CS6 might not be fully functional.
That is absolute, massive nonsense! That misconception needs to be nipped in the bud, not spread around.
The trial version is exactly the same, identical binary as what you buy from Adobe. Hundreds of thousands of users simply input their serial number into the trial version when they acquire a license, and they have a fully functional copy.
…and all Photoshop versions can read documents generated in any prior Photoshop version.