.nib decompiler?

You will need to have an editable .nib package, with at least the keyedobjects.nib file to match things up. Since almost all nibs in Snow Leopard are compiled, without the source .xib file you are pretty much out of luck.

Hi,
I do not know if I am in the right place but I'm a newbby and my issue is with a .nib file.
I'm following the "xcode quick tour guide" and when I get to Creating a Project > Editing Project Files > Using Interface Builder, it says to double-click on the mainmenu.nib, then In the MainMenu.nib window, click Classes.
When I do this, I do not get the window as shown in the tutorial. I just get a finder window showing me the contents of mainmenu.nib (keyobjects.nib and designable.nib).
I think I might be missing a software component because my .nib file's icons are a plain white sheet instead of the square yellowish icon shown in the tutorial. It's as if I was missing the program that reads .nib files or something.
I hope I'm making sense and I can get some help.
Thank you

It sounds like that guide is for an earlier version of Xcode. In the Xcode Help menu, there is an *Xcode Quick Start* item that has various links to Xcode and Cocoa documentation, including a workflow tutorial to get you started.