As to the...interior world... Everything you see in San Andreas is the same map.. It isn't an easter egg, Its just one big level. Interiors are above or below the skybox, and as such, you can not normally see them. I know this because I have played various mods on SA Online that allowed you to go inside houses.. I watch OTHER people go in houses, and watched the players tag to find out where he or she went..
While being quite funny, your sig was the biggest one i've ever seen so far. No more than 700x250 please. ~utrack http://pastebin.com/SYQXBufs