+1  A: 

This is why people have written coding standards (with defined naming conventions) and have code reviews!! Make sure you implement those procedures right now, to prevent his from getting any worse in the future.

Also for around $300, SQL Refactor™ is an excellent tool. If you were to use search and replace, you'd have countless errors and spend hours and hours editing code. I wouldn't even consider using anything other than SQL Refactor, and would never even try using a manual search and replace method on something as large as you describe.

KM
Thanks KM, i really tried this tool during last 3 days and it give me nice results
Space Cracker
A: 

You can use Visual Studio 2005 Database Edition, 2008 Database Edition or 2010 ultimate to load up your DB schema. This provides refactor capabilities, as well as database "builds" that check references in stored procedures, views and functions to ensure all tables and columns referenced actually exist.

ck
i don't know this, but is it will be efficient way for my renaming case at least ?
Space Cracker