How to view hierarchical package structure in Eclipse package explorer

OK here's what I would like: in the Eclipse package explorer, I see the following: (dot represents a clickable arrow that I can use to expand the folder)

PROJECT Source Folder Package Class Package.SubPackage Foo Bar Package.OtherSubPackage Package.OtherSubPackage.VerySubPackage OtherPackage Foobar OtherPackage.SubPackage Baz

Source Folder Package Class Package.SubPackage Foo Bar Package.OtherSubPackage Package.OtherSubPackage.VerySubPackage OtherPackage Foobar OtherPackage.SubPackage Baz

Package Class

Package.SubPackage Foo Bar

Package.OtherSubPackage

Package.OtherSubPackage.VerySubPackage

OtherPackage Foobar

OtherPackage.SubPackage Baz

Long story short, I want to have many packages, each with many subpackages, in a source folder (and several source folders, so making more won't solve the problem)--so on the order of a couple hundred packages per source folder--ten to twenty packages each with fifteen subpackages. Therefore, I want the hierarchy to look like this:

PROJECT Source Folder Package Class Package.SubPackage Foo Bar Package.OtherSubPackage Package.OtherSubPackage.VerySubPackage OtherPackage Foobar OtherPackage.SubPackage Baz

Source Folder Package Class Package.SubPackage Foo Bar Package.OtherSubPackage Package.OtherSubPackage.VerySubPackage OtherPackage Foobar OtherPackage.SubPackage Baz

Package Class Package.SubPackage Foo Bar Package.OtherSubPackage Package.OtherSubPackage.VerySubPackage

Package.SubPackage Foo Bar

Package.OtherSubPackage Package.OtherSubPackage.VerySubPackage

Package.OtherSubPackage.VerySubPackage

OtherPackage Foobar OtherPackage.SubPackage Baz

OtherPackage.SubPackage Baz

so I can open or close a package and see a list of subpackages instead of having package and subpackage all at the same level in the hierarchy--which again makes far too many packages simultaneously displayed. Note this is not a question about filesystem; the file system works fine as far as I can tell--it is only a question about the visual display in the Eclipse package explorer.

So: is there a way to add levels to the hierarchy? Thanks!! (Eclipse Helios on OS X 10.6)