Actually, its quite simple.
Just load Kazaa Lite up, then go to the menu up top, "tools", then click "options", then on the main tab "My Kazaa Lite"(should be loaded, if not, click on it), and at the bottom it should have a box and next to it, it should say: "Launch Kazaa Lite automatically". If there is a checkmark in the box, click it to remove the checkmark, then click "apply" and "ok". This should prevent the program from loading on startup.
RMF