How to make the image hover between the 2 uploaded image?
Display both images independently with something like this:

&lt;div class="portfolio_area_left"&gt;
    &lt;?php print theme('image_style', array('path' =&gt; $imageone, 'style_name' =&gt; 'image_800x600', 'attributes'=&gt;array('alt'=&gt;$title))) ?&gt;
    &lt;?php print theme('image_style', array('path' =&gt; $two, 'style_name' =&gt; 'image_800x600', 'attributes'=&gt;array('alt'=&gt;$title))) ?&gt;
&lt;/div&gt;


Then use jQuery for the hover/fade: http://jsfiddle.net/adeneo/xTw44/