Basically you're going to have to reposition and resize the comment section.
you may have to use a -# on the left? depending on how gaia has their sections working.
so basically
#comments
{ position: absolute; left: ##; top: ##; width: ##px; height: ##px; }
for the backgrounds i belive it's
#comments .caption
{ background: url(URLHERE) }
i'm not entirely sure about the second one as i was just trying to think off the top of my head what i used.
i'll come back later if it's wrong and try to post the correct one ^^.
though i think it may be posted in the stickies up top