Hmhm, here's what you could try. Delete the info.pac from your SD and even from the trashcan. Next, back up your SD card and format it. At FAT32 format. Then put your backup back onto the SD card. Download a clean info.pac and import your song titles. If that doesn't work, are you using an SD card over 2GB in size? But I hope the backup works.
The SD Loader doesn't work with music hacks, you'll need the File Patch Code 3.5.1 for music hacks. The paths remain the same. The code is inside the spoiler:
Ok... i tried doing that Seg and it didn't work... I even tried just using the file you sent me and that didn't work either... music titles hate me...
EDIT: I even just tried putting an unedited info.pac in the info2 folder and it still freezes...
I assume this freezing started when you put a info.pac on your SD card? Try to run your hacks WITHOUT the info.pac this time, and see if it still freezes. You either did something wrong while editing the info.pac or another one of your hacks causes the freezing.
Segtendo's solution will probably work for you, if not I would recommend getting a clean info.pac file. The song titles just work perfectly for me, I just copied the MiscDate[7] from my mu_menumain.pac and replaced the MiscDate[140] in the info.pac with it.
Here I will post all of my CSP Portraits. I hope you like them, and that you'll be able to put them to use in your CSS =]. I do take request for any character portrait. They look much better in game, I can assure you of that.
How to use:
Step 1. Download all the CSP Portraits you want to replace, save them in a folder you can find easily later on. Step 2. Open your "sc_selcharacter.pac" in BrawlBox. Step 3. Go to "char_bust_tex_lz77" in your "sc_selcharacter.pac" and open this too. Step 4. Now go to the character's CSP Portrait you want to replace. (Detailed information on finding your character in the spoiler ahead. Step 5. Right click on the CSP Portraits you want to replace and select "replace". Guide it to the map where you saved your CSP Portraits and select the correct CSP Portrait to replace with. Step 6. After you're done replacing all of your CSP Portraits you can save your file and put it on your SD card.
Character ID's: 0 = Mario 1 = Donkey Kong 2 = Link 3 = Samus 4 = Yoshi 5 = Kirby 6 = Fox 7 = Pikachu 8 = Luigi 9 = Captain Falcon 10 = Ness 11 = Bowser 12 = Peach 13 = Zelda 14 = Sheik 15 = Ice Climbers 16 = Marth 17 = Mr. Game and Watch 18 = Falco 19 = Ganondorf 21 = Meta Knight 22 = Pit 23 = Zero Suit Samus 24 = Olimar 25 = Lucas 26 = Diddy Kong 27 = Pokémon Trainer 28 = Charizard 29 = Squirtle 30 = Ivysaur 31 = King DeDeDe 32 = Lucario 33 = Ike 34 = R.O.B. 36 = Jigglypuff 37= Wario 40 = Toon Link 41 = Nothing 43 = Wolf 45 = Snake 46 = Sonic
If anything is unclear about this please let me know!