I'm not doing it for you but you can do it after simple instructions, trail & error and little knowledge of css
download this
WinMerge
use it to compare the style.css between 5.6 default template to what that template
note the changes on a notepad or somewhere else
open up style.css of default template of 5.4.1 and try to apply the changes noticed
the rest just to import the images and and test out the style
NO MORE QUESTIONS if you do then please stop running a site and learn some html
Good Luck