CS3 can not use the latest ACR 8.7 version. You need to download ACR 8.7 with the DNG converter and create DNG files for your NEF files and use these with the ACR supported by CS3 ACR 4.6....
Thank you for your help I have already downloaded ACR 8.7 and tried to download DNG converter will have to back track on this as didnt recognise the file when I downloaded it. is the problem now that I need to change my files to DNG from NEF files before opening in photoshop?
Please be patient as I seem to have got the jist of the problem but not sure the converter is on my computer what should I be looking for?
Many thanks have managed to sort with your help.