The way with Get Info > Open with > Change All bla .. bla .. bla .. doesn't work actually. When i set these way for a type .php (for example), it always open with XCode next time.
I've set File Association inside Eclipse already. But whatever, it doesn't work.
So how to solve it?
My Eclipse is Helios on Mac OS X 10.7.3.
Right click on file and choose "get info", then in the "open with" section, apply by clicking "change all".