You should use whatever is best for your vidcard and whatever sound best. If you don't know ... EXPERIMENT! RESEARCH!! And you configure them by clicking the configure button. Read the documentation. If that doesn't help you much, read the faq. If you're still lost as on how to setup a plug-in, post a specific question, with your system configuration and specific plug-in that you are trying to configure. Also give the search function here a try, for some odd reason I believe there have been plug-in configuring threads posted before for ff9 ...