title: Modify Liferay's Marketplace portlet
body: <p>I have installed an application for Social Networking from Liferay's Marketplace in my portal. It includes a portlet with a wall (similar to Facebook's one). I would like to introduce a slight modification to this portlet. I know I can modify the JSP directly in the server's web apps deployment folder, but that doesn't seem like the right choice in terms of maintainability. I have also thought about using a hook but, as far as I know, they can only be applied to Liferay core plugins, since add-on's are deployed as separate web apps.</p>
  
  <p>Any idea on what I could do? I am new to Liferay, so maybe there's some simple solution I have overlooked.</p>
  
  <p>Thanks in advance.</p>