It's CSS and HTML.
Go into your admin cp,
edit the one you want.
HTML markup ( btw i cant remember exactly by memory)
First sideCode:<span style="background: url(images/backround9.gif)"><b><font color="#339966">
Upload the attachment in the /images file on your server.
<span style="font-weight:bold;color:#336699;background: url(images/backround9.gif)">
/* Text Here */
Look around bud... (google.com?)
Or if your good in graphics try making your own? never hurts to try :)
Well I tried what Tyler said, and it redirects all of the numbers, whether it be 1, 9, or 9999. Maybe it was just a glitch on my browser's end, but I'm pretty sure it's because there's only one sparkle image. Not sure though.
You can edit the GIF image in Adobe Image Ready and change the Hue. Image Ready should conserve the animation. Just goto 'Image'->'Adjustments'->'Hue/Saturation' to change the hue.
[I'm unsure about the last option, but it contains the word 'Hue' somewhere in there]
Admin>User Groups>Go to color and use the span background html code.