Well for edit textures just download a program
Download Here:http://www.mediafire.com/?zydnezwehuz
After you downloaded it copy or move it to ur top foldrer then enter it an batch file will pop up and just wait it to disappear , after that if enter texture foldrer you will see all the images in format bmp and editable!
Download Paint Net:http://www.mediafire.com/?ya3yzyby1ng
And start editing!

For Help Just PM Me!