Sample Projects - wont work in unity 3

Hi I’ve so far downloaded 2 sample unity projects, the sewers projects and the 2DGameplaySampleProject. The thing is i think they are both version 2 projects as they’re both being converted when opening, but when I open them up there’s nothing in the scene editor just a bunch of files in the project navigator, is there any way of running these projects on unity 3?

Well first of all, one thing you could try is if any of those files say something like “scenes” or anything similar open it up and there should be a scene file in there.

if this doesn’t work feel free to ask more questions.

also what type of files are these before I go any further?