In this article, we will show you how to convert your PSP ISO files to CSO, DAX or JSO format.
Method 1 of 3: Use UMDGen
Step 1. Download UMDGen from this URL-
Step 2. Open the program
Select your ISO file. Go to the "Conversion" section. Choose "Convert to CSO".
Step 3. Set the file compression value to 9 so that it becomes very compressed
Step 4. Launch it on PSP
Method 2 of 3: Use PSP ISO Compresser for Windows
1 Download Compressor http://www.psp-hacks.com/file/900
Step 2. Select the type of compression or decompression, for example ISO-DAX
Step 3. Select the input and output files
Step 4. Set the compression ratio to 9
Step 5. Done
Method 3 of 3: Use CISO XP
1 Download Compressor http://www.iso2cso.com