In the RSS template, find:
<a href="{url}">Change it to:
<a href="{url}" TARGET="new">
Or (I think):
<a href="{url}" TARGET="top">
For finding RSS pheeds, we use this Official Thread in the private forum:
http://www.dombom.com/cgi-bin/dcforum/dcboard.cgi?az=show_thread&om=217&forum=DCForumID9