moodle installation ?

Hello,

I am trying to setup a copy of my Moodle websites locally to do some tests,  and I have some successes and some failures.

SUCCESS

If I install "Moodle" all seems to work perfectly.

But because I want to have several sites, I need to change the folder names for Moodle and Moodle Data

So the only change I made was moved it to a subfolder ie.  

Before:  MAMP/htdocs/moodle25

I also changed config.php to reflect this change

$CFG->wwwroot = 'http://localhost:/CLIENT/moodle25'; 

I try to refresh and I get a blank page...  

Is there any other thing that I should be changing? 

Thanks!