Why not use some jQuery magic and use the title "Attribute" instead of a Title "Tag"?
I think you're confusing the two in your original question
Check out this jsFiddle
http://jsfiddle.net/s5qUw/2/
I've also used the jQuery Tools Tooltip
Markup note: Basically all YOU need to do is add the title attribute and the addtooltip class to any page element that you want to add a tooltip to.  Then you can use CSS to style the tooltip however you see fit.
<path
   id="AK"
   class="addtooltip"
   style="fill:#f2d0ff" 
   onmousemove="GetTrueCoords(evt);"
   title="this sis ak<br>with a line break">
</path>
CSS
.tooltip {
    display:none;
    background-color:black;
    font-size:12px;
    height:40px;
    width:160px;
    padding:25px;
    color:#fff;    
}
Script (bottom of your page)
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"> </script>
<script src="http://cdn.jquerytools.org/1.2.4/full/jquery.tools.min.js"></script>
<script type="text/javascript">
    $(document).ready(function () {
        $(".addtooltip").tooltip();
    }); // closes document.ready
</script>