I found some setting worked without the README.txt content

some content in README.txt to guiding how to install this module

Part 1: do same as below to change setting in fckconfig.js

Edit the fckconfig.js file and set the FCKConfig.LinkBrowserURL and FCKConfig.ImageBrowserURL properties to:

FCKConfig.LinkBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Type=Image&Connector=/modules/fckeditor/ssip/connector.php"

FCKConfig.ImageBrowserURL = FCKConfig.BasePath + "filemanager/browser/default/browser.html?Type=Image&Connector=/modules/fckeditor/ssip/connector.php"

Part 2:
change the fckeditor.module and found out setting on below:

$base_path = variable_get("fckeditor_base_path", 'modules/fckeditor/lib');

change to

$base_path = variable_get("fckeditor_base_path", 'modules/fckeditor/lib/');

I found an error occur is $base_path has no slash('/') path name

i do this change may easier to fixed some problem .

have fun.