Opening RAW images in PS3

[KmH]

First off, I doubt you have PS3 and what you really have is CS3. They are not the same thing. PS3 was last available about 1994.

RAW files won't open in any version of Photoshop. They open in Adobe Camera RAW (ACR), a standalone RAW converter that's included with Photoshop.

It's going to depend if the camera that made your RAW files is supported by ACR 4, the only level of ACR CS3 can use.

If it not, you will either need to convert the files to the DNG format or upgrade to CS5, and ACR 6.

So, what camera made the RAW files?