Changing Character set to Arabic In Oracle

Kindly guide me how to change the character set to Arabic in Oracle . please mention the steps that i need to follow, regrading it.开发者_开发百科

go to start>run type regedit and then look for by pressing h key in keyboard hkey local machine and software and oracl dev home and look for nls_lang change it to AMERICAN_AMERICA.AR8MSWIN1256

Check this link for step by step instructions: http://download.oracle.com/docs/cd/B10501_01/server.920/a96529/ch10.htm#1009904

STARTUP MOUNT;
ALTER SYSTEM ENABLE RESTRICTED SESSION;
ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
ALTER SYSTEM SET AQ_TM_PROCESSES=0;
ALTER DATABASE OPEN;
ALTER DATABASE CHARACTER SET AR8ISO8859P6;
SHUTDOWN IMMEDIATE; -- or SHUTDOWN NORMAL; 
STARTUP;