You have to upload them to a server like photobucket or flicker or any like that. Then copy and paste the location of that picture into the UBB code of this site. You do that on the page that you go to if you click preview reply before you enter a post or when you click quote. The UBB code is to the lower right of where you type. In photobucket the location is to the bottom right of a picture when you open it. You want to copy the direct link and paste it into the box that opens when you click "image" in the UBB code. Not sure of other photo hosts, many pictures all you do is right click a picture then click properties, and in properties of the picture you copy the location to paste in the UBB.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!