You don't 'really' need pictures for such a simple mod. It works, no viruses,
"Kinda useless" ON ITS OWN... Picture this. You're on hardcore. You have mo creatures... EvilCraft... Archimedes ship mod... and a few lesser mods. You don't care to park your rear in one place the entire time and want to make an airship - a BIG airship. You need a LOT of string for air balloons for that. Oh, and where the heck are all the spiders when you need them? Nowhere to be found. But you can get wool anytime with all these sheep you keep finding absolutely EVERYWHERE... Gosh, I really wish Minecraft would allow me to get string from wool, not just wool from string.
Does THAT situation make the wool-to-string thing seem useless?
Also, I know I'm years behind this conversation, but not everyone can afford the luxury of internet access whenever they feel like it.