multi style.css files ...

[Red-Omni]

im wanting to install a option like that of Helios-Multi .
in the helios multi theme the users can choose between different colors and images on the forum ( kindof customize their experience )
well im using the default theme in RC2 and i would like to edit the site to include the color changer option .

can someone tell me how to go about including this option in the default theme .. i just want it to select between different style.css files for the changes to be made .

THANKS alot .

[Deaks]

Please read Different Stylesheets in one theme