easiest would be to put the chatbox inside menuarea2. so auto it will be larger.
as for styling; it was mentioned : due to fixed images it is hard. example: menu 1 (2 settings : 1 for default,1 for custom pages) find around line 143/144 from theme (rc_4left)the line that states : style = 0 change this to 40% to experiment. look at result.
similar line is found on 76 (custom)
now after saved them (of course backup made ) look how it interacts with all the different things. center,right etc. The content within the menu area will also be affected. Most things that will add to the adjustments can be found in style css line 1 up to 52. In here you will find the used settings, and the targeted images (which also carry a size to keep in mind).
Another easy experiment to see how some things react is: same line (144) change the width ( = 6) to 60 save. Look again and you see what you are up to. Anyway success, and if anybody still has ideas to easily accompl. this : have a go and help..
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