What are ll the details u need to give the comprehensive detail..
Actually Lynn doesn't *need* to answer any of your questions. She's trying to help you out of the goodness of her heart - just like all responders in this forum. This is not a support desk with SLAs - people respond out of a desire to help others. They respond in their own time and of their own free will. Demanding someone gives you a comprehensive detailed answer like this is rude, pushy behaviour, and is not acceptable. Please read the Forum Etiquette post here
and become familiar with what is acceptable and what is not acceptable on Cognoise. You cannot dictate to other forum members in the way you are doing here.
Have you looked at the Cognos Upgrade Central site? https://www-01.ibm.com/software/analytics/cognos/customercenter/upgrade.html
If you follow the link "Upgrading to IBM Cognos Business Intelligence" you will find a wealth of detail on things you need for a successful upgrade. There. I didn't *need* to give you an answer, but as a fellow Cognos user I'm doing my best to help you. I hope that satisfies the demand you made above.