This is written by me for you, if for instance the skin changing system on minecraft.net isn't working It is also useful if you have pirated Minecraft :p However, doing this is changing the default skin on the game, so if you go online everyone who hasn't changed their skin will have this But still, a way to have a custom skin even in pirated =D
You need: An archiver (Winrar, 7zip etc)
Ok so first off find your skin For this I personally go to TheSkindex, minecraftskins.com
I am going to choose this skin, Purple Penguin
You want to choose this button, for download:
If for whatever reason you can't see the snapr, it is the down arrow onto the grey rectangle
That should start off your download which should take seconds. When it is done save it somewhere memorable, I chose my desktop.
Then hit the Windows Button and R, or go into the start menu and select 'run'. Into there, type '%appdata' without the appostraphe's, and click ok
The case doesn't matter =D
In the folder which opens, select '.minecraft', and then the 'bin' folder.
Once in there, right click the 'minecraft.jar' (it might just be called 'minecraft', and be classed as an Executable Jar File) folder and click 'open with...' and choose the archiver you're using, which for me is Winrar.
Once you have opened that, scroll down the page until you find 'char.png'.
This is your skin. Now reselect the skin you downloaded and copy it (CTRL + C). Go back into the archiver and paste (CTRL + V). If you use Winrar, a box will pop up. Just click ok
Now you're done! Simply load up Minecraft and your skin should be changed =D I can't show you that because I don't have Minecraft on this netbook
Hope it worked for you!
Q: I can't find the char.png in the archiver?
A: Sometimes the char.png is actually in the subfolder 'mob', if it's not in the main folder is should be in there.
Q: When I paste in the skin, it comes up with errors?
A: Make sure Minecraft is fully closed. If it persists, go into Task Manager and look for 'javaw.exe' or something similar, and end the program. Retry pasting in the skin, and it should work