[Turtle91]

You can use the float command in your css file:

CSS
.images  {clear:both; margin:2em 1em}
.floater {float:left; width:20%; margin:0}

HTML
<div class="images">
  <img class="floater" alt="" src="../Images/img_1.png"/>
  <img class="floater" alt="" src="../Images/img_2.png"/>
  <img class="floater" alt="" src="../Images/img_3.png"/>
  <img class="floater" alt="" src="../Images/img_4.png"/>
</div>

-OR-

CSS
.images     {clear:both; margin:2em 1em}
.images img {float:left; width:20%; margin:0}

HTML
<div class="images">
  <img alt="" src="../Images/img_1.png"/>
  <img alt="" src="../Images/img_2.png"/>
  <img alt="" src="../Images/img_3.png"/>
  <img alt="" src="../Images/img_4.png"/>
</div>

I prefer the 2nd one...it's a little cleaner.