oh cool you got the psd files available? I did manage to find some files to change all but the left and right border colors.
I made a mockup image for you illustrating what i would like to do,
As you can see here on my demo site:
www.premier69.com/12mm-x-32m-satinband-olika-faerger-1
There is a main menu button up top called "produkter", now I've made an article listing my product categories and linked it to that "produkter" image button in the joomla menu module and as you can see if you press that link it goes to a new page showing that content just as it should. now all i need is for that to instead of opening in a new page to open in your lightbox.
Now, here is the mockup image i made for you:
www.premier69.com/mockup.png
as you can see on that image, the lightbox is basically in the hex color of "333333" but the sidebars are still black since i havent yet figured out how to change those. I even managed to translate the close button into swedish, for the market i intend on using it for.
So if you could provide the psd i could happily change the black themed lightbox. Oh and I don't want any darkening fading of the rest of the website during the lightbox active state, i think i distracts the user and it wont look look when my site is shown inside an iframe on a white host site.
As for your qestions 2 and 3 I don't know what would give best results using, if you've seen my website and understood what i wanna do using the mockup maybe you can suggest how to best achieve that? Do you guys have some sort of comprehensive help file? like which thing does what and such, the inline examples and descriptions within the plugins config are all well and good but I'm not sure why there are 2 plugins for example...