Well a lot of the colours and similar are set in the css files. I would make a new design (copy the base folder in the design directory and call is something else).
Most of the customisation to do html-wise is in pagelayout.tpl
But I would recommend you to start changing the css-files and the pagelayout (and other templates). That's when the fun begin...
Take a look at these examples:
http://ez.no/products/ez_publish/demo/flash_demos/creating_a_custom_style_part_i_creating_an_offline_copy_of_the_site
http://ez.no/products/ez_publish/demo/flash_demos/creating_a_custom_style_part_ii_shuffling_layout_elements
http://ez.no/products/ez_publish/demo/flash_demos/creating_a_custom_style_part_iii_changing_site_colours http://ez.no/products/ez_publish/demo/flash_demos/creating_a_custom_style_part_iv_creating_a_new_style_package
I am thankfull to you people who tried to help me installaion and customization of ez Publish. I have one more basic question what i have to do if i want to add some images on different pages and change logo etc, i know these are very basic changes but i am very new to this thing tht's why asking this type of questions.
I am using 3.8.1 for http://www.digimanager.net/ Please have a look at the page, I want to change look and feel of this page, i want to change bg colors, add images and remove the section after "Show children" etc.