Adobe Photoshop Elements; help!

I'm pretty sure this kind of post is allowed. I hope it is; I've read the rules! Sorry for my second question post today~

I was wondering, is there a way to make really smooth curves in Photoshop Elements? I know I can just draw them, but they never turn out very smooth no matter what I've tried. If you want to know what I'm talking about... I have an example of it on a header; here.

Thank you very much!! :3