I've been struggling to learn how to install sound mods with Sawndz, and it has not been a fun experience.

I'll insert the hex packets correctly, with Sawndz telling me they were correctly inserted into my bsrar. When I get into game, none of the announcer sounds I added work (just the regular brawl announcer), and when I start a match my game freezes. The mods I've been trying to use were all downloaded from brawlvault:
-Cloud announcer for Ike
-Sephiroth announcer for Marth
-Cloud soundpack for Ike
-Sephiroth soundpack for Marth
-Goku sound pack (the newest one that is just a .sawndz file, this I was able to install just fine)
-Volnutt sound pack over ROB (this one just never works)
-Volnutt announcer (female announcer that came with the volnutt pack)

What am I doing wrong to cause these crashes? I correctly put the hex number thing into the offset box and inserted, yet all this trouble is being brought onto me. What can I do?