Great information, although you could have done more to promote your own LogIn! Dusting, IMO is the best way to deliver the necessary calcium, but this method is only practical if the frog eats it immediately after dusting or will eat from hemostats. If your frog will do neither of these there are a couple of things you can do to help prevent metabolic bone disease.
Consider the frog's activity. Try feeding later at night, with less disturbance.
I also recommend keeping the crickets around for a few days and feeding them chopped fruits and vegetables. Healthy crickets equals healthy frogs. The only time that the commercial high calcium cricket diets should be used is within 24 hours of being fed out. The high calcium is fatal to crickets. Since the calcium can be passed the through the cricket relatively quickly after being eaten, it might be a good idea to keep a small dish of the high calcium cricket diets in the cage so that the cricket can eat while he awaits his impending doom.
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...the oldest task in human history: to live on a piece of land without spoiling it."
Aldo Leopold (1938)
"Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us."
Calvin and Hobbes (Scientific Progress Goes 'Boink', 1991)