Yes, but just take note that they aren't backed up as actual ISO files. They're packed as VPK files instead (just a renamed ZIP file), and you need to install them via VitaShell for them to be playable from the LiveArea. Have you checked databases for cheat apps such as RinCheat? Maybe they already have money cheats for the game(s) you're looking at. Failing that, the main place to look for the money value is usually the (decrypted) savedata. I'm not an expert in save hacking, but that's something useful I know about it.