Performance center is Web Based mercury tool if ia m right.Call Helpdesk and they will configure it for you.Its pretty tedious job if you try from yourside as you will also need the help of mercury support for it.
Elizabeth, You may want to check your purchase order for PerformanceCenter. In the past Mercury has refused to sell the product without services to install it in the customer premises. I have seen this philosophy on the sale of the product continue since the HP Merger.
It is entirely possible that this is a USA-only sales philosophy on the product, but still it's worth a double take at the PO to see if you have the flexibility of scheduling someone to come onsite to do the installation who has "been there and done that." The installation is not pretty, involving lots of components which should be installed and configured in a specific order.