Beginner for cognos administration

hi all,
im beginner to cognos administration so any one plz help for the documentation for the congos admin
if possible send me the documentation in pdf,ppts r doc if possible send me the url to download and videos to c
thnx all
cing for earlier reply

take a look at this link.

http://www.cogknowhow.com/index.php/web-links/2-ibm-cognos-8-downloads

item 5 contains all the Cognos 8 documents/guides