Oracle 11g XE greek character set not displaying

Question

I used an Oracle 11g EE to create my database and access it through PHP using PDO, and all was working good. But i had to change to 11g XE because i wanted to use it freely inside my company. Now, greek characters won't display on PHP (i get �������� instead). I tried to change the character set with :

shutdown immediate;
startup mount;
alter system enable restricted session;
alter system set job_queue_processes=0;
alter database open;
alter database character set internal_use EL8MSWIN1253;
shutdown immediate;
startup;

But i ended up corrupting the CLOBs.

Now, after reverting to the last known good backup i am trying to use CSSCAN but i cannot find it inside my bin folder or anywhere to download.

Any thoughts on this??

I really need to make it work..