I have to change a number of keyboard shortcuts. Earlier (Windows 7) I download a script KeyEd Up from Adobe and copy it to C:\Program Files X(86) > Adobe > After Effects > Support Files > Scripts > (Support). I have now Windows 8.1 and when I try run File > Scripts > Run Script File I get an emty panel without shortcuts.
The script may not be compatible with CS4. Check with the folks that created the script. I've never tried it.