No you can't easily since Migration assistant only allows you to select certain things to copy over, applications, user settings, documents etc. The CS4 apps are in applications, which you can copy, but also installed are thousands of supporting files, some in your user library and others elsewhere The only way to copy them over and have them work is to copy everything, and even then CS apps are ones that will usually ask to be re registered after a migration. You'll need to dig out your original install disks to do it properly.