Sometimes the default skin can be boring and its pretty easy to create your own.
What you need:
Winrar or some extracting program
For your convenence I have included a default texture pack for you to edit and my homemade splinter cell texture pack.
Step 1: Finding the Files
Click start and then run.
Type in %appdata%
And extract Minecraft.jar
Step 2: Editing Your Textures
the list of files:
Achievement (don't touch)
Armor (cloth, iron, chain, gold, diamond)
Com (don't touch)
Environment (clouds Rain snow)
Font (don't Touch)
Gui (inventory items)
Item ( arrows, boat, cart, door, sign)
Lang (don't touch)
META-INF (don't Touch)
Misc ( nothing really of value)
Mob( your Avatar, animals, Monsters)
Net (don't Touch)
Terrain (sun and Moon)
Title ( don't recomend touching
Pack.PNG (picture on select texture screen)
Pack.TXT (texture description)
Terrain.PNG ( block Textures)
And a bunch of "Class" files(don't edit)
Step 3: Gimp Time
open gimp and enjoy.