OK, well......Control arms I can converse about in a mostly intelligent fashion. Tie rod's, on the other hand, are something that effects the allignment of your car. My advice about them is this : if you don't know anything about them, have someone who does replace them. That way, they can do an allignment at the time of install.
If you're going to do them yourself, when you're done.... please take it to a mechanic you trust with the machine to do the allignment, you'll be much happier, and your tires will last longer.