Okay Let's Begin:

1st Step: Open HLMV. Choose Which model you want and Export the texture you want to edit. Open the .Bmp in Photoshop. See Screenshot 1.

2nd Step: Change the .Bmp into RGB mode so you can use it later. See Screenshot 2.

3rd Step: Open the texture that you want to reskin your model with. Im going to use Camo By: G-Flow (Can be found on the Free Camo Thread :) ) . See Screenshot 3.

4th Step: Select The Clone Stamp Tool and set the Opacity to 30% to avoid erasing detail. See Screenshot 4.

5th Step: Make the Camo texture your current viewing picture and go to the bottom right corner, then alt-click it to select it as your starting point. If you recieve an error make sure your pictures are in RGB format. See Screenshot 5.

6th Step: Now Start brushing! Be careful not to click on every spot because this will saturate the area with more pattern then it will if you maintain a smooth stroke. See Screenshot 6.

7th Step: This was only one texture, now you have to do this to the other textures. Your texture should look like this:

Remember to go to Image/Colormode(or whatever has the indexed, adn RGB stuff) and select Indexed otherwise the texture will not work!