Krets... anythings possible my man.
The squares could just be plain ol (absolutely positioned) DIV's containing a linked image. The link would call a function that would make the relevant piece of content display in the gray area.
<DIV ....><A HREF="Javascript:getContent()"....><img src=....></A..
You get my meaning. The scroller is easy really, I posted a link to one that is NN6 compatible yesterday.. hold on.. yep, here it is :
http://www.assembler.org/XLAT/05/index.html
If your willing to give the project (and for someone not offay with Javascript, it will be a 'project') a bit of time then you will most certainly be able to achieve the effect (I really like the idea B.T.W... nice background graphic also). I can guarantee you will also learn a hell of a lot about Javascript in the process, even if it is through dissection of other peoples code.
You will just have to keep in mind that Rome wasn't built in a day.
Think BIG Krets.. theres more than enough people here to assist with the tricky bits anyway..
God, I'm unusually optimistic this morning !