Today you're going to learn how to make exactly what the title says. Before we start let's take a look at the TC checklist.

What we'll need
1.) Wally 1.33+ (you can get that by clicking the wally button on TC).
2.) This tutorial. Print it out, memorize it...wahtever!
Wow! That was short! Good, now we can get on with the tutorial.

The Texture
Nothing special about this texture. It looks pretty cool. You can use it in a medieval setting or it can be used along with the Halflife fifties textures (look through them in Worldcraft).

Step 1.
Load up Wally 1.33+ (preferably 1.34). When you start the texture you can either do this as a Quake2, Quake1 or Halflife texture. I chose Halflife because I could use my apocx.pal (you can download that from the files page). The texture size should be 128x128.

Step 2.
Making the texture.
1.) Fill with a medium gray
2.) add monochrome medium noise horizontally. Stick with the defaults for line length etc...
3.) add monochrome medium noise by single pixel
4.) Using the selection tool (the arrow) select the bottom half. You can select as much as you want actually. If you want a small footer then just select about 16+24 pixels. In this example I select just under half the texture.
5.) Uses the "recolor" brush. Select a brown and the mode of paint should be set to solid rectangle.
6.) Now part of your texture is brown. Yay!

Detailing the texture.
1.) Add a line scratch (medium) at the very top of the texture and at the top of your wood footer.
2.) Add a line scratch right down the middle of your wood panel footer. This is to make it look like a single plank spanning across.
3.) Use the darken brush at the top of your texture (the grey) set it to medium. Set it to 4 pixels wide and round. From here you start drawing darkened stains along the top to give the concrete a worn look.
4.) Now select all the concrete (not the wood or scratches).
5.) Choose "Add Noise" and select vertical noise. The default lengths of noise will do just fine.
6.) Now select just the footer. Choose add horizontal noise. Then repeat with just single pixel noise.
7.) Select the concrete and sharpen it lightly.
8.) Select the wood panel and blur it lightly.

Finishing the texture
You may notice that the scratches aren't pronounced enough. You can fix this by either re-scratching (with light selected in the percent drop down list). or you can select just the scratches with the arrow tool and sharpen them lightly.
I also added rivets to my texture. I added them on the wood plank where they'd make the most sense. But wait! These are rivets! Yeah I know that's why I selected a medium / dark grey and tinted them (a round 4 pixel brush). Now they look like nail heads! Perfect!
And here's what the final texture should look like: