Been sent to take over from a performance test contractor that had been doing some Performance testing of a thick client application. The LoadRunner scripts are essentially C scripts making API calls to the application. They are huge and although there is little logic in them difficult to understand from the obscure API calls. Still that comes with the territory of a performance tester.
BUT, what is missing is the original documented click scripts through the application. All I have to work on are the transaction names. So please fellow performance testers leave the click script documentation around before you leave the project!