Hmm it should work, but will take some trial-n-error.
Yes, both installations are Windows files and should be identical... besides your mods of course.
Is your Windows and Linux dual-booting from one hard drive or separate hard drives?
Sounds like what you want to do is update one World of Tanks game files in Windows, but play in PlayOnLinux from the same install without having to update again.
You could always copy all of the game files to your Linux WoT folder instead of sharing...
You should be able to access your other available Windows drives and partition through Mint 14. I do it all of the time.
But its a lot harder to keep it mounted after you shutdown. To do this you need to perform some Terminal comands...
This requires mounting the drive adding information in your fstab file.
Once it mounts every time you launch Mint 14, then you can create links to the game folders.
You should be able to just create a new virtual drive and then a shortcut to the game folders. Make sure to install the necessary libaries in PlayOnLinux just as you would if installing the game.
I'm not sure if Windows file system encryption or permission will have problems?
Great idea by the way!