Because I always forget how to do this. (Using ST4 in ordered mode).
Draw a sketch on a tangent to the surface you wont to project on to.
Add your text using the text insert tool.
Use the wrap sketch function from the surfaces menu. Select the surface you want and then the sketch/text.
Finally use the add normal from the solids menu. Select the sketch elements and then choose individual settings to suit extrusion distance etc.