Run Zbrush once you have installed Zwrap in the plugins folder. Import the wrapped mesh (new source mesh) and convert it as a polymesh.

Now import your target mesh, click on append and select the reference mesh to add to your scene.

Go to the texture menu and import your texture file.

Go to the texture map shelf and create a new texture. Apply your map on the source mesh. Go up to the UV map shelf and click on flip V. Do the same flip for your target mesh.

Be sure your target mesh is in the first position in the Subtool menu.

Now, go to Zplugin and open Ztexturetransfer.

Set the resolution to 16K, Click on preference and activate "Limit distance", as well as the margin of the baking process.

Then check the projection as a preview. if you're not happy with it, try to translate your target mesh, or tweak the offset in the preferences.

Once you have an accurate projection, click on "Extrapolate" to bake an accurate map.

Once you are done, you can finally export your texture into an EXR saved file.