So, I've done some more experimenting today... I'm not totally experienced with flashes outside sine I've only got my flash at Christmas. I read guide online on outdoor flashing and I tried to put it into practice in my backyard, with semi-productive results.
So, the guide said to go into shutter priority - set the shutter speed to your flash sync speed at your desired ISO (100 in my case). Take a meter and remember the aperture. Then go into manuel and set the shutter to the flash sync speed, and the aperture to the aforementioned aperture. I guess all this messing around was to get the fastest shutter speed available and having 0EV... To get back a DoF while using flash, you'd use a ND filter - easy enough.
This wasn't my problem... as you can see in photo 1, the flash is not there. I couldn't "overpower" the sun. It was at my back and I couldn't see much of a result. The flash was off camera right, so I should have seen a distinct light on the left of my face. I then when into the shadow (photo 2) and this is exactly what I was looking for.
Anyway, just looking for some general comments if you guys have had experience with this thing - anything you could ad at all would be appreciated.