there is a complete list of all items found at gamefaqs.com under the title of consoles cheats/codes. it's been up for at least a month. so i would say no, the huge list above was not really needed. it might have been best to add it to the PC version cheat codes thread already started in this very forum.
there is also a topic in this forum called savegame hex-editing guide that covers the hex-editing post as well. the info in it also comes from gamefaqs.