There’s many ways to skin this cat in Sony Vegas Pro. I’ve done it using Photoshop to make my lower-thirds background, then generated text in Sony Vegas.
I could probably do it all on Vegas but the client wanted a shape to the lower-thirds and wanted it to “fly” in from the side. It was fairly easy using Track Motion to make the lower-thirds fly-in.
Just search the forum for “lower thirds” and you’ll find a lot of answers.
Steve Mann
MannMade Digital Video
http://www.mmdv.com