This is an EASY way to make a Minecraft texture pack for 1.2.5 Lets get started! Disclaimer: I did not create the files in this folder. All CREDIT GOES TO MOJANG.
1. Download my Minecraft texture pack creator Link http://www.mediafire.com/download.php?gbmgavwevx0cjtt Dont worry it doesn't have any viruses or anything like that but you can virus scan it if you want.
2. Open you favorite photo editing tool (Paint.NET, ETC.)
3. Unzip the MC Blankpack folder and edit the files as you please. :D
4.(optional) once your satisfied zip back up the folder and publish it to Planet Minecraft or any other texture pack website. Next, if you haven't already, make an account on Media fire or any other file sharing website and upload the files :D. Note: Planet Minecraft has a way to just upload your file to it and not have to worry about anything else so you might wanna take that into consideration.
Hope this helped! If you have any questions post it in the comments and i'll get back to you as soon as possible :)

If you don't know how to use texture packs check out my other post (coming soon)

SEEYA! :D