I am currently using the Nikon D3200 and I can't update my camera raw plug-in to 7.1 because I am using CS5. On the supported cameras page, (http://helpx.adobe.com/creative-suite/kb/camera-raw-plug-supported-cameras.html) it says that I need 7.1 in order to open my NEF files, I am currently using 6.7.1... What can I do to edit my photos? (Apart from upgrading to another version of Photoshop)
Download Adobe DNG Converter 8.5 for free. Check system requirements first, you might have to use an older version, like 8.3 if you're on XP or an old OSX.
Install it and run it. Go into Preferences, look for Compatibility settings and change it to ACR 6.6 and later.
Point it at a folder of D3200 NEFs and create DNG copies. You can open these copies in ACR 6.7.