you would use the text tool, there are three options and the last one, I think, is text on path. that is what you need to use.
I don't use it much as I design in inkscape and don't do a lot of text on path, but it should work about the same.
you have your shape (path) and your text, select the text with that tool and drag it over the shape. or you can select that tool and then click on the shape and start typing.
hope someone who does use it comes along soon and can help you more.
Cutters: Phoenix Silver Bullet 18", Black Cat Cougar 18", Silhouette Cameo
Software: Scal 3 & Pro Inkscape, Inkscape, CAP2, Gimp
Computer:Macbook Pro running Snow Leopard