How do I manage resource copies for my build product in Xcode 4?

Using Xcode 3, I could expand the active target group in the “Groups and Files” column and explicitly add or remove package resources from my product.

Using Xcode 4, I created some text files that I want to read from my set of build products at runtime.

When I check my build product suite, I see that Xcode 4 does not add these files to my build product, even if the "Target Membership" inspector from the text files indicates that the files are associated with an active target.

Using Xcode 4, how do I manage the resources that are copied to the package during the build process?