Has anyone put together (helped) start a charity car show?

[Flicktitty]

My nephew is going to be 7 later this month and has Osteogenisis Imperfecta (brittle bone disease) He has broken multiple bones in his short life, and usually gets around in a wheel chair. he spends countless day's in the hospital and the Ronald McDonald house ever month or so. And this weekend we are having a large family rummage sale and he wants to have a lemonade stand and the money he gets he wants to donate to OI so they can find a cure for the people that have it.

So i got to talking with him and said we should have a car show and he got all excited. so i was thinking of trying to put one on but i have no idea where or how to start this. Any idea's or thoughts on how to do this?

I am already a highly active member on multiple local forums so getting alot of people to show up shouldn't be too hard.

thanks advance.