Hey Patrick is the Corel Paint in X4 better with mov files? X3 is a steal nowadays, I think you can pick up a boxed copy of X3 for under $100 now.

The 2 tools are the Bezier Tool (5th Icon down left side) where you just click...click trace over your project, and the Shape Tool (2nd Icon down left side) to manipulate your nodes or left-click on the curves to add or subtract nodes.

Very easy to use, (I save as Illustrator 6.0 files) and produces great results, the tricky part is after vert conversion and selecting faces for domain shading, and thats rather easy in Carrara.
I'm happy with the results.

Carrara 7 Pro, Anime Studio Pro 8, Hexagon 2.5, Zbrush 4.6, trueSpace 7.6, and Corel Draw X3. Manga Studio 4EX, Open Canvas 5, WACOM Cintiq 12WX User