You really only prepared textures for the top of the pallet and wood ends. Should you now go back and make more textures for the rest? Why should you, if you can get away with recycling what you've got? Here's how to use plain areas of the timber texture within your existing texture, to complete the model.
Triple click each of the three members in turn, right-click and select Group.
Now go to View ¦ Component Edit ¦ Hide rest of model. This means when you edit any of these groups, you'll only see that group and nothing else. This is going to help you finish the more inaccessible bits of texturing.
Double-click on the left-hand side member to edit it. Select the Paint Bucket tool and paint the texture. Did you notice it's the wrong scale? Undo this, and click on the texture in the Materials Pallet. This resets it back to its original scale.
Now apply the texture again. Right-click and go to Texture ¦ Position. Move one of the timber...