http://quarryorchard.blogspot.com/2010/12/plywood-to-plank-flooring-tutorial.html
Interesting link, although I seem to recall a recent thread where someone wanted to do a plywood plank floor and several on here did not recommend it for a variety of reasons.
I just scanned down though the comments left about this project and boy did almost everyone drink the cool aid. :o
At least one person commented that they still have a pine floor that will wear.
And how do you clean the cracks?
And they are thinking to doing this for a kitchen floor. ??? Holy cow, can you say delaminate?
If one looks around and has some patience, one can find real flooring for less than $1.00 a sq. ft.; or even real pine planks.
I looked at the referned pictures and like before it still looks like plywood to me, not a real strip wood floor. The grain just doesn't appear right to me. I think I'd nail down the plywood sheets and call them what it really is; plywood. But that's just me. Sooner or later I'd be putting ceramic or porcelain tile over it anyhow.
Maybe draw lines on the plywood with a Sharpie marker? ???