Yes, this is the same how-to that I have posted on their forums:
1) Create a winxp bottle and name it
2) Select the installer and run it
Once the installer is done:
3) Select the "Manage Bottles" menu entry
4) Select the bottle where the game was installed and go to the "Control Panel" tab and select "Wine Configuration'
5) Under the "Graphics tab" deselect:
* Allow the window manager to decorate windows
* Allow the window manager to control the windows
* Emulate a virtual desktop 1280x720
(can be any rez you wish)
6) Under the Audio tab change "Hardware Acceleration" to "Emulated"
(not enitrely sure this is needed but better safe than sorry)
7) Click "OK" and exit the config
8)Select the "Simulate a reboot" option and click "Launch Selected item"
9) In the "Bottle" tab, select "Run command" and make sure the bottle where you installed the game is selected. Click browse and find the "StealthBastard.exe" file and double-click it.
Launch the game. There will be some glitches.
You can use the "Create Launcher..." button to create a shortcut to your game.