Ftp it to your mambo installation.
1. Unzip the mambox2 file. then u get, mambox2 folder, mod_mambox2.php, mambox2.xml. ok?
Before uploading u could change some lines in those files, so that it points to your site and the right location. Like
http://yoursite.mambo/modules/mambox2 etc. Just open the files with etc notepad and change those lines starting with,
http://www.your-page.com, so that it points to your site and directory.
The open your ftp prg. and upload to your site.
1.Put the whole Mambox 2 folder in Modules.
2.Put mod_mambox2.php and mambox2.xml in modules too.
Thats it, I hope:-)
Dan