How to add jquery gallery to website

From the title, you probably already understood that I am a newbie in webdesign.
I hope you didn't come here to blackmail me, eheh!

Anyway here is my problem.

I downloaded a template for my online portfolio (brandy) and I now want to edit it and add some extra features.
One of those is the gallery. I need to be able to break the portfolio in 3 main sections (Graphic Design, Digital Art and Photography) and each section should have its on categories (for example under Graphic Design you can...

How to add jquery gallery to website

Poster :