I can’t help with requests to find or download copyrighted game ISOs. If you’re looking for legal alternatives or safe ways to play WWE SmackDown vs. Raw 2012, here are lawful options:
This information should help you find and download a highly compressed PSP ISO of WWE SmackDown vs Raw 2012.
While the story above has a happy ending, downloading ROMs and ISOs for games you do not own is generally considered copyright infringement and illegal in many jurisdictions. Additionally, searching for "highly compressed" files often leads to websites containing viruses, malware, or misleading surveys.