You can check how the modules in demo are setup in foot-left and foot-right http://www.joomlart.com/forums/topic/userguide-ja-nex-template-for-joomla-2-5/
Do you just want to remove the specific width given to foot-left and add more positions and want it to behave it like user5,user6,user7, user8 positions? If you can explain it a bit, how many positions you want there and if left / right most column from those will need to have a specific width then you just need to change params in <block name=”botsl2″ type=”spotlight” special=”left” specialwidth=”75″ main-inner=”1″ >foot-left,foot-right</block>
You will find this code in template manager > Your template > Layouts tab > Default layout..
You can add / change position names where you see foot-left,foot-right