There are several guides, all very easily found if you had looked.
My custom graphics guide - https://eoserv.net/forum/topic/2624
Pingys guide to general patching - https://eoserv.net/forum/topic/2655
And Deathxs guide to changing the background (3 posts down) - https://eoserv.net/forum/topic/2632
Hope I helped.
May he now rest under aegis of mirage -
As the sands slowly turn to Elysian fields