Right.
I need to go into more depth Gerald.
As Slipwave says there are flashes that will work remotely as "slaves". Canon use an ST-E2 which works with infrared and works well indoors (I will give you that as well).
Outdoors and where line of sight cannot be maintained radio slaves are better hence the eBay type I suggested above. There are also Pocketwizards (which I also have and you ain't getting them

) which are my weapon of choice but very expensive. Ellinchrom do a "Skyport" which is also good but probably similar priced to PW's.
Back to the picture. You did the right thing in getting the light of the camera (to the left and above in your shot) but now you need to "bounce" light in from the other side to soften the shadows. Flash is good but must be set at a value below the main light or you can simply hold up a large white reflective thing (card, newspaper, fridge, etc) to the right and let the reflected light do it's thing.
Easy eh!