I was wondering how do i change some stuff on texture packs? for example, im currently using Johnsmiths v5 texture pack (32x32). i love it but i hate the mobs, logs, and inventory/crafting/smelting screens. i want to change them to something like a costom painterly pack. Any help on how to do this? Thanks!
1) Open files in Paint.net/Gimp/Photoshop
2) Edit to your hearts content, then save.
But in all seriousness... All the files you need are in the texture pack... Just extract the texture pack onto your desktop, and open them using an image editor THAT SUPPORTS TRANSPARENCY, Edit them, then save them.
The Furnace, Chest, and Inventory screens are usually found in the GUI Folder.