I just chatted to Nawal at Red Giant software who said it will not work on CS5 because it is 64 bit, however it may work on CS4, so I could set up a legacy system and run it that way.
I will need to obtain a serial number for the software after downloading it from their legacy software website, presumably I can find this online.
Ideally though looking for another software plug in though, really throwing down the challenge on this one…. if anyone thinks they are up for it, the AE gauntlet is ready to roll!