byethost how to install WP?

I registered a free host account at byethost .But I can't find autoinstaller for WP .How can I add WP installation in my host account ? I tried using FTP manager WP install file to upload .It says file size is big .Don't work .
How can I install WP ?

1) Download FTP Client (filezilla)
2) Connect to your website via FTP (usually the domain). Instructions should be provided in your "Welcome" email.
3) Login. Your username and password should be in the welcome email. If this host uses cPanel the FTP username\password are the same as your cPanel username password.
4) Drag and drop files into (usually) public_html (or www)