It will delete music from iPod Touch, but the regular iPod i don't know about.
Downgrading your iPod Touch should not delete anything.
bring up the song list, hold your finger on the song you want to delete for a few seconds, another menu pops up with delete as an option.
unfortunatly there is no way to delete songs from the iPod touch itself to delete songs you need to do it through iTunes.
You cannot delete the legal information in the settings on your iPod Touch.
veiw it and press delete
delete it from your library in itunes
I have an iPod touch and when I delete applications the memory that it uses comes back. I used my iPod touch to type this.
I don't now a other way to get cydia of but the only way I know how to take cydia of is to restore your iPod touch
restore your ipod touch on itunes
nope
Just place the card in your PC card reader and select the file to delete. It's the opposite method you use when putting the games on