Normally, you'd get the silent freeze if a single or combination of hacks can't be handled in game. Mostly because of filesize I think. Even just hovering over a specific character in the CSS with a mod over their default costume could make a silent freeze. I'd slow down, and hover over specific characters with colors you know you've modded to try and find out what's causing the freeze. If you can't find it, you can try formating the SD Card
Yeah, it's like he said. But
don't format your SD Card. It's a problem with the combination of attacks. I know this because I have had this sort of problem before. It's a
somewhat common thing.