Popstation freezing

I recently ripped Cronos Cross to my PSP, and I was thrilled when, after a long day of struggling with popstation GUIs, I managed to make the eboot run correctly. I've gotten to the first "boss" at the beach, but every time I kill it, the game stalls. The emulator is still running, but the screen and the music freeze. So, could someone either
a) give me a save file directly after the giant lizard boss thing, or
b) Tell me what they think the problem is, and how to fix it?

thanks