I am trying to change the size of the logo area so I can fit my logo in there and it doesnt look undersized. I am in no way a computer guru or web designer. Just trying to save a few bucks by fixing the website up myself. So I may be doing the codes wrong but I followed the guide in the tutorial and changed both

/includes/languages/english/header.php
/templates/template28172/css/stylesheet.css

I have made changes to both and still find the logo area un-changed.

http://http://hostilediesel.com/store/

Here is my store, I am using version

Zen Cart 1.3.9h
Database Patch Level: 1.3.9h

I would like my logo to be about 3x bigger if possible It is only
W-200px
H-58px

I think the image looks kind of small and distorted when I resize it that small. Any help would be greatly appreciated

-Eric