The only mod you can do is on the 9500np.
This are the features of the different cards:
9500np: 4 pixel pipelines, 256bit or 128bit memory
9500 pro: 8 pixel pipelines, 128bit memory
9700: 8 pixel pipelines, 256bit memory
9700 pro: 8 pixel pipelines, 256bit memory but with an higher clock.
Well, this 4 cards have the same gpu, in the 9500np there are 4 hidden pipelines that can be "free", and if you have the 128bit version, you can mod it to a 9500 pro as my case, or if you have the 256bit version, you can mod it to a 9700 which with overclocking, can be a 9700 pro. This can be done by a patchscript that itīs in the rivatuner utility, using the omegadriver, or using w1zzardīs ones. Anyway, for further info you can visit this page:
http://www.ocfaq.com/softmod/faq.php