automatic lightbox??

Hi everyone,

A question about plugins like lightbox/greybox/thickbox/lytebox:

1. Can I insert a page or html into it instead of an image or video?
2. Can they AUTOMATICALLY POP UP the first time someone comes to my website? That lightbox would then be able to redirect people to the right subdomain. This automatic popup function is so hard to solve for a code-ignorant guy like me. Ack!

more detail…
My website, still VERY much in assembly, is designed around regional organizing and gathering. Thus, I want my splash page to be, not a static page, but a crisp lightbox that asks “Where are you?” with either a clickable map of regions (which correspond to subdomains) or a list of those regions/subdomains. So if people go to the main site, theperi.com, the lightbox would help them be directed to something like, say, newengland.theperi.com.

I’ve found some plugins that popup pages or html instead of images, but I’ve not found one that does it automatically.

Thanks,
Brandon