Boy are you in the wrong place..do read the description of the forums which should give you an idea of where to post..
Anyway..yes you natively install Windows on an Intel-based Mac through Boot Camp. A program that will allow you to make some room for Windows on your hard drive, then install Windows and provide all the necessary drivers for your Mac to Windows. Using this method, each time you boot up you will have to option of booting into Windows or OS X.
There are hundreds of posts/tutorials about this, so do read up and FULLY understand how to do it before doing it. More often than not, the novice user will end up blowing OS X away during the hard drive partitioning process and then wonder why they're just left with Windows. This is made worse when there is no active backup of your data on OS X.
Through the boot camp method, you will only boot into one OS at a time..if you wanted to always have Windows or any other OS ready while running OS X, then you'll want to use programs like Parallels or VMWare Fusion which create a virtual machine to run Windows in. Depending on what you want to run Windows for (short of gaming), the VM route is perfectly acceptable..
