I have got Loadrunner 9.5 and I need to connect it to Performance Center Software. Could any one tell me how I could get that as HP Download Center does not have a software named "Performance Center Software".
Contact your sales rep for HP or your VAR (Value Added Reseller). Assuming you have purchased a copy of PerformanceCenter they will be able to sort out your access or get for you a copy of the installation media and documentation.
Keep in mind you will probably be on the back end of the installation team and their efforts before you can use PerformanceCenter.