to replace relative path with worpress path
  <img src="<?php bloginfo('template_directory'); ?>/images/mainimage.jpg" title="" alt="" />

==Plugins to install==
SEO admin

mobilise the blog
  *WordPress Mobile Pack
  *Wptouch
  *sitemap xml for google

Next Gen gallery http://wordpress.org/extend/plugins/nextgen-gallery/

suckerfish dropdown navigation http://htmldog.com/articles/suckerfish/dropdowns/

good layout is http://www.strawberryleisure.com/