You can find the " Car Jack Streets " PSP Mini content through digital preservation archives. While the original PlayStation Store for PSP has been largely retired, the game is available in community-maintained collections.
If you find the file in .iso format and specifically need a .cso (compressed) version to save space on your memory stick, you can use a tool like UMDGen or maxcso to convert it. Download Car Jack Streets (minis) cso
Another specific repository is the psp-cso-collection directory which contains compressed game files. You can find the " Car Jack Streets
Are you looking to play this on or through an emulator like PPSSPP? pspminis directory listing - Internet Archive Download Car Jack Streets (minis) cso