Thank you so much♥
The only thing you need to do is to click on the Browser to your left, and then you will see all this alternativesand. But you have to click on the "Skins". (If you want to add a skin you have made, so everyone can see it). And when your there you will se a blue button on you left, under the advertising, where it says "Post you skin". And than you just click on it, and go on posting your skin. ♥ Hope this will help you and made sense xD