Problem Add Picture

Question
1.from this content :
Originally, I had planned to use CSS3's nth-child() pseudo class to select the various list items in my HTML, but after some consideration — and, frankly, some trial and error — I ended up adding a class name to the various list items. Here is the amended HTML for the five-image collage.
<div id="content-slider">
<ul class="five-img-slide">
<li class="slide5-1">getSkinUrl(images) ?>/hero-1-of-5.jpg" alt="hero one of five"/>
<li class="slide5-2">getSkinUrl(images) ?>/hero-2-of-5.jpg" alt="some copy"/>
<li class="slide5-3">getSkinUrl(images) ?>/hero-3-of-5.jpg" alt="some copy"/>
<li class="slide5-4">getSkinUrl(images) ?>/hero-4-of-5.jpg" alt="some copy"/>
<li class="slide5-5">getSkinUrl(images) ?>/hero-5-of-5.jpg" alt="some copy"/>

</div><!--end content-slider-->
If i want add in static block . what did i do?

Question 2.
from this content :
I begin by navigating to styles.css at skin > frontend > default > abn > css in the Magento hierarchy. I head to about line 115 and add the following description.

/*Content Slider & Hero Images */
#content-slider img {border: #fff solid 5px; border-radius: 10px; -moz-border-radius: 10px; -webkit-border-radius: 10px; -o-border-radius: 10px;}

By setting the unordered list's position to relative and the list item's position to absolute, I create a box of sorts, where I will position the list items that contain the images.

#content-slider .five-img-slide {list-style: none; margin: 0 0 0 -8px; position: relative; width: 960px; height:470px;}
#content-slider .five-img-slide li {display: inline; position: absolute;}

By setting the unordered list's position to relative and the list item's position to absolute, I create a box of sorts, where I will position the list items that contain the images.
#content-slider .five-img-slide .slide5-2 {left: 370px;}
#content-slider .five-img-slide .slide5-3 {left: 370px; top: 280px;}
#content-slider .five-img-slide .slide5-4 {left: 570px; top: 280px;}
#content-slider .five-img-slide .slide5-5 {left: 720px;}

Remark : My theme in about line 115 is
{ background:#fff; border:1px solid #bbb; border-top:0; border-bottom-color:#666; padding:16px 16px 50px; min-height:1448px; }
-->
.main{padding:16px 16px 50px; min-height:350px; color: #fff; }

.col4-set .col-1 { float:left; width:23.5%; }
.col4-set .col-2 { float:left; width:23.5%; margin:0 2%; }
.col4-set .col-3 { float:left; width:23.5%; }
.col4-set .col-4 { float:right; width:23.5%; }


what did i do if i want follow a content but i not see line 115 add a code.
Please help me thank you very much.

Note : i add in style.css but i don't know true or fale please help me thank you very much
/* 2 Columns Layout */
.col2-left-layout .col-main { float:right; }
.col2-right-layout .col-main {}

/* 3 Columns Layout */
.col3-layout .col-main { width:452px; }
.col3-layout .col-wrapper { float:left; width:689px; }
.col3-layout .col-wrapper .col-main { float:right; }


i want add image same this picture
I have 5 picture in skin\frontend\default\mytheme\images\media
picture 1 size is 655*372 pixels doc size 23.11*13.12 cm
picture 2 size is 325*186 pixels doc size 11.47*6.56 cm
picture 3 size is 325*185 pixels doc size 11.47*6.53 cm
picture 3 size is 325*187 pixels doc size 11.47*6.60 cm
picture 3 size is 655*187 pixels doc size 23.11*6.60 cm

I tries edit code in app\design\frontend\default\mytheme\template\page\3columns.phtml
<div class="col-right sidebar"><?php echo $this->getChildHtml('right') ?></div>

<?php /*</div>*/ ?>
</div>
<?php echo $this->getChildHtml('footer') ?>
<?php echo $this->getChildHtml('before_body_end') ?>
</div>
</div>
<?php echo $this->getAbsoluteFooter() ?>
</body>
</html>

and I tries edit code in skin\frontend\default\mytheme\css\style.css

/* 2 Columns Layout */
.col2-left-layout .col-main { float:right; }
.col2-right-layout .col-main {}

/* 3 Columns Layout */
.col3-layout .col-main { width:452px; }
.col3-layout .col-wrapper { float:left; width:689px; }
.col3-layout .col-wrapper .col-main { float:right; }


but It not show picture Where is Error Please help me. Thank you very much

I am tries any choice but not work please tech me step by step . thank you.