Can I hack my PspGO !!?

I just purchased it today.. N it says version 5.7... Is there anyway dat I can upgrade or downgrade it to custom firmwares so dat I can play homebrew and ISO\CSO games.. the country I'm living does not support PSN(play station network)... Plzzzzzzz help M vry upset coz I purchased it for gaming and not just for music and videos.... Bst answer will be rewarded 10 points.. thanx