Hey all, I have a question about how to stack my wood floors to let the Acclimate. First, can they be stacked in the box? Second, is there a pattern I should use when stacking? Third, is there an inexpensive moisture meter I can get to test the subfloor and the new floor?

Thanks,
BlackNoir

I've seen some pics of stacking where they did a row, in the box, going north to south with spaces in between and then a row on top of that going west to east. Out here we call that log cabin stacking. Is this a good practice? If so, any reason why I couldn't do a row going north to south, then put some 2x4's across that row and then do the next row north to south again? I ask because my flooring boxes are 8' long and I don't really have an 8'x8' area I can stack these in. I can make an 8'x4' area though.

Doing it the way you want will accomplish what you want. However, this is where I diverge from the common practice of acclimatizing.
Most manufacturers recommend the material be brought on-site for a few days before installing. IMO this does absolutely nothing except aggravate potential problems. Stacking up the boxes and even opening the ends only creates an unbalanced flooring where the board ends and edges reach a different MC than the material in the centre of the boxes.
If you want to acclimate properly, you must open all the boxes, and distribute the material (called racking) in a single layer, or double with spacers if need be, throughout the space.
I should mention that nobody does this, before you get into a sweat about it.
So you try to meet this system as close as your space allows you to do. Monitor the MC of the subfloor and the finishd floor untill they are within 3 percent moisture content of each other; while maintaining live-in conditions all the while.

question? If you use underlay eg vloc does it matter what the mc is of the subfloor. I currently have carpet over a 40 year old subfloor which is plywood. If I use vloc or the sort does it matter

While V-Lok is and excellent underlay (we use it on all first floor installs), I suggest you still get within the 3 percent max range between floor and sub-floor prior to installing. Consider that if for no other reason, it is a requirement of your warantee.