well, this is how I used to be a princess in one day at my wedding. I just designed it by myself. sure, you can also designed wedding gown by your own too. well, I browsed pictures of wedding gowns every day. and I decided to wear grey. I don't really like white. I think white is fit for a certain type of cloths. not all. hmm, but hey, basically every colour is okay for your favorite gown.
for a moslem-wear, it is kinda simple. well, you just need a long dress. put it also your fave accessories on your body. it could be brooch, necklace, sequins, and absolutely beautiful veil. I say if you use veil on your wedding gown, just make sure, you have a right accessories. just choose less than 1 or 2 accessories on your head. and it will make you a beautiful women :)
there are optional accessories for your list: irna la perle the beautiful moslem wear, haircomesthebride a various accessories for your day, lightinthebox, theweddingoutlet, or i can say you can googling by yourself :)
ps: if you copy the wedding gown, just make sure not all of part of the gown is fit for you. maybe grab two or three pieces like the skirt form or design of the sequin or the arms into your wedding gown.