First you pick the Font you like then tap the download button and the font will temp load on your browser
Then you pick the size you want or just use the default size which is 55

Then to the right of size is color selection, tap the button and it will present you with the simple palate they offer and chose one you like or you can use the guild's color palate and enter the color code, mine is AFEEEE

Once that's done Enter what you want to write in the font you selected earlier in the big box at the top of the page 
Next step is to tap the generate button

Check your text image an if you like it then tap the create url image button
Copy the image url like any picture

Here is my header for Megan missing the front *[* bracket

[s][/s]

img]http://fontmeme.com/freefonts/img.php?f=7821&s=55&t=Megan&c=4169E1[/img]

[@The Elvenqueen]