What I have been working on is the items and the inventory and I've gotten a couple of the items done and a lots of the inventory tweaks. I am going to share the pictures down below, so if you would like to see them just click the spoilers.
[As you can see this is the regular inventory screen. But there is also some new buttons below the crafting bench. One opens the crafting table (which is the screen currently open). The second one opens the treasures. The Third one opens the Adventure pouch.]
[This is a tweaked form of the inventory screen. As you can see, the portrait is gone and the armor slots have extended and now host the Fire earrings, Shield, the Digging Mitts, and the Dragon Scale.
To the right of it is the treasure slots, these hold the treasures that can be found throughout the world. These items will be dropped when you get killed just like normal items, when you re-pick up these items they'll be put into there respected spots.
You can also store your harp on this screen, when it is in this screen it can be used any time you want just pressing a selected key. Ignore the Quiver that is a mistake that needs to be changed.]
[Oh mi gosh, this one will be hard to explain.
As you can see the armor and portrait are missing. There is now a pouch slot where you can put the Adventuring pouch, when you put the pouch in it allows you to use the other 8 pouches for you to store certain items.
Next is the Songs, these are the songs that you have learned and found. These things will do various things and they can only be played when inside the song area.
Next is the Map, it will do something when in Skyloft (Skyloft will be a Dimension). The Heart Container will show how many heart pieces you have. This is probably the most complex screen.]
If you are interested in helping me make this modification then just tell me. M'kay?
Know if you'll excuse me it's time for me to go to sleep... No seriously it's like 2 am.