Dude a very good news for you. if you live in india then you should have seen the ad of new"samsung star3,gt-s5220". in that ad you can see operamini in main menu. i searched for firmwares but are not availabe on web.
i know that star3 firmware won't work on Monte but it might help you in adding operamini to main menu.he i get any firmware of star3 i will inform you.