Wikiomatic – opening links and photos

Great plugin. Just two questions: 1. How do I get the wiki links to open in a new tab (or window) instead of sending my visitors away from my website permanently? 2. I get a "The image could not be loaded" message when I click on a thumbnail. How do I get it to open or remove that message (I don't want my visitors to believe my site is broken)? I'm looking forward to hear from you. Henrik