Sculpting in MatrixGold Emboss with Wacom pen

Hi there,
Tried a few different settings on my wacom pen, has anyone had any success with using it to sculpt on top of rest of Emboss mesh? It would be a whole lot more exact than using the mouse.
Whatever I do, my pen just seems to move my viewport around. I need my nib to be set to LEFT CLICK but it just acts like right click in this mode.
Thanks if anyone has any experience in this!!