I'm a new member of Expedition Portal, and see a thread I might be able to provide some input on.
ARB installed a complete suspension on my 2007 Frontier as a beta-test this past September. It went on without a hitch except for having to enlarge the holes for the beefier OME U-bolts at the axle. The OME suspension gave me a lift of about 2.5 inches in the back and just a little less than that in the front. I do have a Shrockworks bumper with Warn 9000, so am carrying extra weight in the front.
I have all the part numbers for springs, struts and shocks if there is any interest.
This week they're installing the ARB rear bumper as sold in the rest of the world. The sent the installation instructions, and it looks like it should go on very easily as well. The rear infill panel kit may not be an exact fit from what I can see in the instructions, but should be simple to adapt.
Ed Sanman