The only issue with the juice is that it may have preservatives in it. If not, then just follow any recipe at all, using the juice instead of the concentrate + water.
I have a Welch's recipe posted that you can use with any kind of juice, on the left under my avatar, or in the recipe database (under "recipes" in the tool bar above).
Broken Leg Brewery
Giving beer a leg to stand on since 2006