Info.plist localization

I want to localize the display name of an app on the iPhone. The standard apps do this (change the language from English to Spanish to demonstrate this; as far as I can tell you need a device, I don't think the simulator supports this yet). I took my Info.plist file and put it into the en.lproj file in which I already had a localizable.strings file, and put another copy into an es.lproj file.

Before I did this, I verified that the localizable.strings localization works fine; change the unit language, and all the strings in the app change as they should. But after I tried the same thing with info.plist, the app will not compile; instead, it gives an error claiming "the file Info.plist does not exist." But I used "Add to project" to add both Info.plist files to the project, so it "should" know about them. Has anyone done this successfully?