how do i make a hogwarts school robe out of a simple black robe?

Q: any ideas? yeahh.. got the idea from wizards of waverly place :] i dont LOVEE the show... harry potter's wayyyyyyyyy in better league haha but any idea how to make this "garment" as it were??? i can't find a picture, and i can't do a 'print-screen' thing because i have a macbook and yeahhh too much trouble... and too confusing haha but heres a video link... http://www.youtube.com/watch?v=VASLV02R24I the part with just her robe is right in the beginning.. so you don't have to watch the whole thing :] and if you want to be technical, its three seconds in i just like this modern day look of it WOW AN ACNE ADVERTISEMENT AS AN ANSWER?!?!?!?!?!? HOLY SMOKES THAT JUST MADE ME CHANGE MY ENTIRE OPINION OF ADVERTISEMENTS ON YAHOO ANSWERS!! JEE-WILLAKERS!! oh btw i was being sarcastic. seriously people just STOP this. its annoying and makes me want to burn your answer. lol i dont care about the points system i just ask questions and answer them as i please.

A: add a maroon collar and an embroidered crest

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