CSS Flyout help

[oxicottin]

Hi,
I hope I am posting this in the right place.
I would like to have a flyout menu for my categories, and I was told to download the CSS Flyout contribution and I have.
What I would like to know is will my colors and design stay the same or will i have to change that once I have it installed? The site is http://www.brodiegirl.com
Honestly, I am afraid to do anything that may change the design since I am not the person that created the template. I really want this menu but need a lot of help and walking through to get it done. I know just about nothing when it comes to CSS. If you think you can help me, please let me know!

Thanks!

I have it installed on my site and it works great! Take a look at my sig and if needed I can try to help with the CSS... Good luck