[Tigga]

how can i group all those new templates i am making into 1 folder?

I'm assuming you mean to group them together like the myvbindex templates and default forum ones, right? To do that you would have to make sure you give each one of your new templates a suffix, something like "mytemplates_aboutus". Then you would need to edit your admin/template.php file and look for:
$only['index'] = 'mYvBindex';

Right below that add:
$only['mytemplates'] = 'Name Of Group';

Just change "mytemplates" in that code to the suffix you gave them, and Name of Group to whatever you want the heading in the template set to say.

Then you would need to find each template in phpMyAdmin and change it's templatesetid to -1.

what does this stuff mean

<!-- no cache headers -->
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="no-cache">
<meta http-equiv="Expires" content="-1">
<meta http-equiv="Cache-Control" content="no-cache">
<!-- end no cache headers -->

Those are meta tags incase you have "Add No-cache headers" enabled in your admin options. They should be at the top of most of your forum's pages.

also i cannot get the $index_footer
to be shown outside the table in the blue background area

You should be able to change where it's displayed by moving the $index_footer variable before or after the table in the new templates you added.

also why did the poll section where it asks the question turn purple after i did this hack?

I just checked it and it looked fine to me, so I'm assuming you figured it out...