To generate a userbar, simply enter a few tags, e.g "the simpsons", without quotes. These tags will be used to find suitable backgrounds for your userbar.
After that, enter whatever text you want written on your userbar, e.g "simpsons fan", without quotes.
Then, press the button and wait!
Note! The process is fully automated and random, meaning your userbars will vary in quality. You may need to generate a few to find one you like.