You left click on the image, hold, and then drag ... wait .. what? If you can't drag and drop, then you're probably out of your depth trying to create a website. Even if you could drag an image into Dreamweaver, it's not a good idea. You should just type out the img code <img src="http://www.domain.com/image.jpg" />.
u can make sumthin like this... <div style="left: -9px; top: -80px"> <img src="jpeg.gif"/> </div> where u can drage that over anything and u can put it anywhere u like