Soooo, to make some things clear, so u guys won't misundarstand (well, I got the feeling some of u ARE misundarstanding ) I'm gonna give u short "definition" of what are the "vectors" I'm submitting here.
First things first - I'm NOT drawing those pics myself from the scratch >< In my case, vectoring means the same as "redrawing". What's the purpose then? It's easy - to give all those more creative authors better quality material to work with. All my works are made especially for AnimePaper (that's why u can't download them here) where good artists can download it, and then make some inf*ckincredible wallpapers.
That should be it. For better undarstanding, wikipedia is your friend - [link]