You'll need Wraptor to unarchive a few files also available for download.
All documentation is included.
What's not mentioned in the docs it that Wraptor's menu allows you to select multiple archives, but this feature has been disabled for this version. If you try to unarchive more than one archive.wra file at a time, the program will simply stop and go into limbo. This is a self dissolving archive file. Just LOAD it and RUN it. Items on this page unwrap with Wraptor V1.