how to import downloaded code from code.google into Eclipse and auto change package name?

I've downloaded the source code from code.google from android. Because they dont come with the eclipse project. I've import them into eclipse. Assuming i've downloaded ABC source code with package named com.example.abc 1. I can't import via "Existing Projects into Workspace". 2. I tried create a android project named ABC with package com.sample.abc i tried import via "achive file" or "file sys开发者_如何学Gotem" into created folder abc. But, all imported files will go into folder abc\abc\src, abc\abc\res,.... 3. how to auto change package name accordingly current project package name? or i've to create project following package name from the downloaded code?