Melty Blood specifically? Can't it be Tsukihime in general ? (You'll get more results that way, though minus Sion, W Len and Warachia if so)
For wallpapers, try searching some imageboards. There was one TYPE-MOON dedicated imageboard before although I forgot the link..
idontknoW has left this forum, that is all.
use the YM / Mail buttons if you need to contact me.