BuddyPress.org

Well a background image is a styling issue rather than what I showed earlier.

One approach you coulfd take is to open up /groups/single/home.php find the #item-header div ~ line 9
<div id=”item-header”>

change it to this:

<div id="item-header" class="”>

That will now output the group name/slug as a class token for all the groups item-headers.

You can now add a rule set to style a specific background based on this unique class – something like:

#item-header.my-group-slug {background: url(../images/jpg.jpg) no-repeat 0 0;}

if you want the background on a nested element then just add to the selector group the child elements:

#item-header.my-group-slug #item-header-content {}

Not sure about the blank tab requirement I’m afraid.