Sure… I'd say just install your Market Theme store into a subfolder like "/store" and then all you have to do is link to "http://www.lucindaguy.com/store" from your main page. That method would be very easy and logical.

Customizing — Yes, Market Theme is customizable in a bunch of different ways. There are a bunch of things built-in to the settings area, and then you can modify the stylesheet as well to change typefaces, font sizes, colors, etc. For that type of thing, there is a free Firefox plugin that I highly recommend for making it easier. It's called "Firebug".

I hope this helps.

Firefox is the best browser in my opinion, but you'll need to design for what looks good in all the big ones. IE, Firefox, Chrome, etc.