Couple questions from a total beginner

Couple questions from a total beginner

Hi folks,

I'm a website developer, and although I've converted a few sites for handheld devices, they all still have a static narrow width.  I'm finally going to get into a style that is a little more flexible, and I like what I see at jquerymobile.  I downloaded the package and did some of the initial design, but it appears that the idea is that you choose one of (or a hybrid of) jquerymobile's styles.  They're attractive and all, but I really need to have more control over the look so that the sites mirror their full desktop-site look.

It appears I have no control over this, and the stylesheets are all externally called.
(e.g. http://code.jquery.com/mobile/1.1.1/jquery.mobile-1.1.1.min.css)

Is there a way for me to have more control over this?  I like a lot of the elements of this package, buttons and such, but I need to be able to use my own custom styling.

I suspect this is probably explained fully somewhere, it's it's probably right in front of me, but I just haven't been able to find it.

Thanks for any help.