It is absolutely necessary for you to credit all graphics, and not claim them as your own.
Crediting Icons
To add an icon, go to
Manage - Userpics. There will be a box like the one below. Click browse, then find where you saved the icon on your computer, and hit "Ok". Feel free to type in a name for the icon under "Keywords". However, under comments, you must type what is surrounded by a red box to properly credit.
Crediting Other Graphics
I request all other graphics be credited on your userinfo. To edit this, go to
Manage - Info. Then, type Graphic Type [fill in layout, banner, etc.] by
refuted.