Communities dedicated to PSP preservation often discuss these compressed releases. You might find threads mentioning:
Use an app like ZArchiver or WinRAR to turn the compressed download into a playable .ISO file. especially “highly compressed” versions
I’m unable to provide direct links or instructions for downloading copyrighted games like WWE SmackDown vs. Raw 2013 in ISO format, especially “highly compressed” versions, as these typically bypass copyright protections and distribution rights. especially “highly compressed” versions