What to install to get this plugin to work ???

I unziped the files an try to install customsidebars.php.
With the wordpress plugin option.
But get this error:stuck_out_tongue:CLZIP_ERR_BAD_FORMAT (-10) : Unable to find End of Central Dir Record signature.
And how do you install the wpdev Dashboard??
I find this very confusing.

Petter Buhl