new positions margins & grid width

Hi
I have installed the msocial template and I have create two new full width positions the header_upper and the bottom_upper (both of them are one upper level from the defaults)
1) iwant to delete the margin between the grid and the bottom_upper position (see attachment)
2) is there a way to make the social grid presented along the whole full widlth?
3) I have use the follwing code in the new positions
<?php if($this->API->modules('myposition')) : ?>
<div class="newstyle">
<jdoc:include type="modules" name="myposition"
style="<?php echo $this->module_styles['myposition']; ?>" />
</div>
<?php endif; ?>
but the sliders are located to the rigths how can put them at center e.g <div style="width:1920px; margin-left:-330px; ">
4) I want to finish my frontpage without margin at position bootom_upper and hide all the rests at home page
thnaks in addvans

Hello,

First of all please provide an URL to your website.

It is about a local installation (xampp)

Hello,

First of all please provide an URL to your website.

So sorry but I'm unable to help you in this case - I need a live access to your website.