Manual
64-bit installation on Windows®:
If you are using Photoshop CS4 as a 64-bit application, you can use the Adobe Update Manager to install Camera Raw 5.7. If a manual update of the plug-in is required, please
install the Camera Raw plug-in in two locations:
a. The CameraRaw.8bi found at the top level of the zip folder should be placed in the following directory:
Program Files (x86)\Common Files\Adobe\Plug-Ins\CS4\File Formats
b. The CameraRaw.8bi found in the folder labeled 64-bit should be placed in the following directory:
Program Files\Common Files\Adobe\Plug-Ins\CS4\File Formats
The above was extracted from here
http://www.adobe.com/support/downloa...jsp?ftpID=4681 which is also the download page.