No, just the standard stage select screen will freeze the game.  I looked at the regular sc_selmap file and it was 1.16 mb, which made me think that's what had been causing it.  So I downloaded a different sss that was only 1.12 mb, but it still freezes when I get to the stage select screen.

At first I didn't even have a custom css/sss and it would still freeze. I looked over that guide and it said that the sc_selmap file shouldn't be bigger than 1.14 mb, so I downloaded a custom sss and it said it was only 1.12 mb, but it would still freeze.  I could understand it being one of the things you two have suggested if not for the fact that it was doing this before I even tried to change the stage select screen.

I'm pretty new to this, but whenever I go to the stage select screen the game freezes.  I saw someone mentioned waiting for the wii to stop making noises after you select your characters, I didn't hear any noises from my wii, but I still waited for about 30 seconds before moving on and it still froze.  I'm using the gecko sd loader, and the only things I modified are a couple of songs.  Any ideas?