*Record scratch*
Hold on one bloody second here.
The only reason I'm not experimenting with it now is because I don't have the money to get the PC version of GTA4. But I don't really want to since I have the console version. Besides, I doubt my computer could handle it.
You don't have seven dollars? You could work at McDonalds for
an hour (okay, maybe an hour and ten minutes to cover federal income tax), quit immediately, and come out of it with enough money to buy the PC version of GTA4 this weekend. You probably wouldn't even have to be there long enough to hear the whole health and safety training lecture.
The crux of the issue here, though, is that you have presented an idea and given us little to no reason to care. There's nearly seven billion people in the world, each of whom has enough neurons to rub together to form about seven billion ideas of his/her own. An idea on its own isn't worth anything. "A dime a dozen" overstates the value of an idea.
You can flesh it out all you like. You can cull as many pretty pictures from the internet as you like to attempt to make us visualize the idea. The fact of the matter is that you've been consistently telling us two things in this thread: (1) You don't want to invest the effort in realizing this project yourself. (2) You can't be bothered to spend seven dollars to see the platform upon which you want to build your project. If this idea is so worthless to you that it's not worth your time or that modest monetary investment, it's pretty goddamn disrespectful to tell anybody else that it should be worth
their time, effort, and money. Modding communities aren't your servants, and the members of those communities have ideas of their own to invest their efforts in implementing.