Well, for starters, you aren't going to get ANY emulator to work on firmware 3.03, ever, with the exception of the PS1 from sony, but it only supports the games they have for sale on the PS3 website.
My advice, take your psp back and try to get one with firmware 2.71 or lower, then downgrade it to 1.5, then install DarkAleX's 3.03oe-a. Or, wait about 4 or 5 months till someone makes a 3.03 downgrader.