How do I make Buddypress link to a new window?

I am running Buddypress through several of my sub sites. What I want to achieve is when a status from one site appears in the activity stream of another and is clicked, that it launches in a new window rather than self. Currently if a post from site A appears in Site B's activity the user is re-directed to site A when clicked. If this was launched in a new window then the user would not be re-directed away from the source site. I hope that makes sense