This is due to the file size. The file is slightly over 2 megabytes, and the default upload limit for PHP is 2 megabytes.
To deal with this you need to change you PHP configuration. You need to put a file in the root folder of your site, called php.ini - you can create it with any text editor. This should include the line:-
This will increase the upload limit to 4 megabytes.
Alternatively you can remove some of the images from the archive (but don't remove the images folder), and upload them later.
It is also very easy to install a module by ftp. Just unzip the archive and upload the module folder to your site /modules folder. Then in your Joomla admin go to the module manager. Click the 'new' button. The new module should be listed among the types, select it, which will create a new instance, then set the module parameters.