How does this app work? I've downloaded 2 of 5 volumes of a movie from MovieBerry. The MovieBerry site indicates that the content is compressed by 7x archiver. So I downloaded Ez7z in hopes of decompressing the 5 files. When I try to Expand the first file, named "movie_name.part.dvd.7z.001", I receive the following:

7-Zip (A) 9.04 beta Copyright (c) 1999-2009 Igor Pavlov 2009-05-30
p7zip Version 9.04 (locale=utf8,Utf16=on,HugeFiles=on,2 CPUs)

Processing archive: /Users/Username/Downloads/movie_name.part.dvd.7z.001

Error: E_FAIL

Also, if/when I finally get past the E_FAIL message, any suggestions about how I put the 5 files together to make a singe movie?

Any and all help will be greatly appreciated!