Someone gave mea headtextue How do I use it?

Activate it, then click the upload button and add a picture. Also, make sure you have either bought or created a 128x128 head texture.

First, you must have a texture for your head. You can make one or request one here

Second, once you get your texture for your head, time to upload it to your tori. You go first here. You will see that there is a word " Head Texture ".

Third, Browse to your folders and get the file or texture for your head. You click it and press " Upload "

Fourth, once this is done, wait 5-10 minutes or more depending on your internet connection. After this, you will see your texture on your head.

Congrats.

If you want a new texture, just repeat the process.

Aspire I got one from some guy. I dotn know how to activate or anything. Explain it simpler?

The texture itself wont work right now, you need to wait.

Also go here to activate it then follow Aspire's tutorial.