To shrink them, files are often repackaged into formats like CSO (Compressed ISO) , or zipped into .rar and .7z archives.
Use a free tool like 7-Zip to extract the downloaded file. You should end up with a .iso file.
This guide is for informational purposes only. The legality of downloading "WWE PS2 highly compressed games" from the internet is complex. In many jurisdictions, downloading a copyrighted game that you do not own a physical copy of is considered piracy. The safest and most legal approach is to from physical discs you own for use with emulators.
Download ZArchiver (Android) or 7-Zip/WinRAR (PC). Step 2: Extract the Compressed File