To change the color of the template look for the below lines of code in the index.php file and change to suite:
// What color style you would like to use. Refer to our demo page at http://demo.shape5.com
for a full display of styles. Enter color1-10.
$s5_color = "color6";
To use colors of certain templates in another I would suggest downloading the PSDs for Your Store. Each color is saved as a separate PSD with all the layers intact. You can use these to make your custom color schemed template. There is no easy way to grab, for example, the menu bar from color7 and tell it to show up in color3. You will have to edit the pictures used and overwrite with your desired color.
I hope this helps.