First of all you could move the taskbar to the top of the screen. That would give you a more osx like appearance. And of course, you could use Stardock's Objectbar with the themes from osx-e. That would be it. Good luck
PS: you could also use HMB (hide menu bar - google it) to hide your file... menus in explorer and internet explorer. The alternative would be Susumu's Styler, wich is shareware. There's an emulation / modding bible here on osx-e that could help you a lot.