Can someone help me find a website with this information about psychological disorders that are classified including the role of the DSM IV.

These sites may be helpful.

http://en.wikipedia.org/wiki/Diagnostic_and_Statistical_Manual_of_Mental_Disorders

http://psyweb.com/Mdisord/DSM_IV/jsp/dsm_iv.jsp

http://allpsych.com/disorders/dsm.html