Hi,
I believe 45Wts are too low to do much of anything. My monolights are each 640 Wts. each, and I should have bought higher powered ones. The guide numbers are much lower than what comes with many on-camera flashes, and extremly low compared to the Nikon SB800 which can be attached to the Nikon digital SLRs.
If I were you, I would keep looking until I found something more powerful. Try your local newspapers or even some of the photomags for used equipment. You also might try putting an ad in a paper or mag where the ads are cheap and see if anyone responds.
Rere