Hi there, if you look in File Manager > Site Files > includes > themes > greptem > templates > inc > html_head.cfm you can set the basic style (dark or light) near the top of that file and then a few lines further down set the colour scheme.
Then, depending on which file (like: light / blue or purple etc.) you select, you go into the respective file in greptem css > light > style_blue.css and find the line
background:url(../../images/light/blue/logo.png) no-repeat 0 0;
and replace with
background:url(../../images/light/blue/my_cool_new_logo1.png) no-repeat 0 0;
or whatever and upload that logo into greptem > images > light > blue
To get the homepage slideshow, you need to first activate Content Collections for your site (Edit Site > Modules), and then add one named Home Slideshow which pulls the info from a portal which can have the same name but does not need to have a navigation link - put some pages in there that have an associated image. Then they show up automatically if your page is set to use the home.cfm template. Hope this makes sense and can get you started a bit.
* Last updated by: JonasLondon on 11/22/2011 @ 11:55 AM *