How to Combine CSO Files
- 1). Change the extension at the end of the file names from ".cso" to ".iso." This allows Windows to recognize the files.
- 2). Select all the CSO files together by holding Shift as you click them individually.
- 3). Right-click the highlighted set, and click "Burn images to disc."
- 4). Select "ISO Disc Image" next to "DVD Burner."
- 5). Click "Burn." This combines all the ISO files into one ISO, which is located in the same folder.
- 6). Change the extension at the end of the new ISO file name to ".cso." You now have a single compressed CSO made up of the earlier CSO files.