hi there it is possible to get the mac window buttons, but is not as good a the transforation pack. this will allow you to transform (most) of your pc to look and feel like mac this includes the window buttons. first go to Snow Transformation Pack 1.0 Released - WinXSoft.com
and download the pack, open it and restart your computer when it tells you to.
once you have restarted open the installer again to start installation, this will take about 5 mins,(NOTE THE SCREEN WILL GO BLANK FOR A MINUTE) you will just see the backround image and will complete the installation.
to get the window buttons on the left download left sider here Leftsider: Move Windows Titlebar Buttons to Left Just Like MacOS - Tweaking with Vishal
(x32bit) and (x64bit)
hope i helped email if you are still having problems, check out my you tube video on this matter. YouTube - How To Get Mac OS X Conversion For Windows 7