Solid Hardwood, Engineered and Laminate Flooring - Subflooring removal problems

I currently have a vinyl floor in my kitchen, dinnette and laundryroom. I plan on putting ceramic tile in the laudryroom, but want to install a hardwood floor in the other two rooms. The wood floor guy I hired began removing the vinyl floor and 3/8" plywood from the 3/4" sub-flooring in the laundryroom and discovered the 3/8" was glued and screwed to the 3/4" sub-floor. After 3 or 4 hours of stuggling he was able to remove just the 75 sq. foot laundryroom floor and gave up.

Because the two plywoods were glued to each other, part of the sub-flooring was delaminating as he removed the top 3/8" layer.
This created peaks and valleys on the sub-floor, which wasn't a problem in the laundryroom (ceramic tile), but would be a problem to try to install a wood floor over that type of underlayment. I am probably going to replace the existing vinyl with another vinyl, but I had my heart set on hardwood. I don't want to replace the entire 3/4" sub-floor because of the mess and cost, so I am looking for an alternative.

My question is, does anybody know of a way to seperate plywood that has been glued together without creating too much damage to the sub-floor? Is there something out there that can break that bond without breaking the bank or my back?

Thanks,
MNHusker

The plywood can be cut into manageable sections using a power saw that has been adjusted to cut through the 3/4" layer. A heat gun can be used to soften the adhesive and a pry bar to lift the sections. It will take time and patience. Any imperfections in the subfloor can be compensated for by using a self-levelling compound.