non me ne intendo molto ma digli di scaricarsi qualche software per decompattare file .zip

tipo:
http://www.versiontracker.com/dyn/moreinfo/macosx/15462
http://www.versiontracker.com/dyn/moreinfo/macosx/5070
http://www.versiontracker.com/dyn/moreinfo/macosx/20285