Im no expert but ill do my best for the skin and screens.
First get an unpacked HDL elf (original unpatched).
Now get "HDL_CC GUI 1.4" for the frames and font colors (gui cus its much easier).
Play with it and set your colors.
When you have something your satified with then get "HDL patch v0.8b gui" to patch your original unpacked hdl elf. Havent used these things in a while but with this i think you can add your main and splash screens plus when done it will pack the hdl.elf file for you ready to use.
Hope i got this correct.
As for the files and programs to do this you can look in my site's download section.
My hangout site: Shaolin-Venoms.com