i dont think double post is allowed, and if u want help u gotta wait, sometimes some1 helps u in no time, otherwise u may wait for 1000 years, but somewhen u will get helped, like now .
ok, lets take a look at this...
if u wanna edit something u gotta unselect the "read-only" thing, if not, u wont ever do anything.
the sound files and the sound editor are very "sencitive", 1 single error, and u gotta reainstall whole the game if u wanna hear something, so always keep a backup.
second: if possible, tell the first error u get, the first I/O error, lets say "I/O Error 324", or something, the number, tell me it, and ill c if i can help ya