ok thankyou i thought this was the case but i opened up a case report with adobe support and that replied saying yes it is possible which left me a little confused. cheers anyway
No, it's not possible without using hacks. And Adobe can't support or endorse hacks
Bear in mind that not only there are new features in a new version which can't possibly be recreated by an older version - also, there are enhancements to existing features, which would make them render differently in the two versions.
That said, there are people posting such hacks, as Sébastien pointed out.