I want to move the LEFT column in between the content and RIGHT column.
You login backend > Extensions > Template management > ja_purity_ii > layout tab > edit default layout, replace this code
<block name="left1">left</block>
<block name="right1">right</block>
with
<block name="right1">left</block>
<block name="right2">right</block>
also, need to give the module headings some sort of styling (a background).
You find this code from /templates/ja_tiris/css/template.css
div.ja-moduletable h3, div.moduletable h3 {
background: url(../images/bg-h3.gif) 0 100% repeat-x; < change url to change background of title of module
color: black;
font-family: "abelregular", Arial, sans-serif;
font-size: 150%;
font-weight: 100;
margin-bottom: 20px;
padding-bottom: 12px;
text-transform: uppercase;
}