customise windows blinds skins

okay i got windows blinds and i love the skins for it so far but i want to know how i can create my own ones, i am quite good with graphic design but i dont know how i can make my own.

Right here: http://www.stardock.com/products/windowblinds/skinning/ IMHO, custom visual styles are more efficient and "safer" than Windowblinds. But if you like it go right ahead.