PR & Traffic Transfer

HI, This is the project for seo people or anybody how know the search engine mith very well. I need to transfer 1 website Page Rank & engine traffic to the another 1 without dumping the old 1. And there must not be any visible changes to the old site or any visible redirection or anything like that. The old site would be working as same as currently. You would be given right for both the sites. Looking for immediate response from we had done It people.