Step 1: Installing Windows 7 Ultimate on BootCamp
1. Go to Applications -> Utilities -> Boot Camp Assistant
2. Create the partition size you need for your Windows 7 Ultimate and click Partition
3. Once completed you'll notice a new BOOTCAMP drive on your desktop.
4. Now insert your Windows 7 DVD and click the Start Installation button.
5. Mac will restart, and Windows 7 will boot. You'll be prompted with a window asking you which partition you want to install Windows on. Select the one with BOOTCAMP in the Name column. Then select the Drive options (advanced) link.
6. With the BOOTCAMP volume still selected, click the Format link.
7. Choose x64 (64-bit processor) for faster Windows performance
8. Choose "Custom" (advanced), click OK and Install

Step 2: Activating Windows 7 Ultimate
1. On Windows 7, insert your Mac OS X Leopard/Snow Leopard DVD
2. Open folder to view file "Bootcamp" and run "setup.exe"
3. Restart After Installation
4. Check for Updates, download and install all updates
5. Run Windows Loader to activate or RemoveWAT to remove Windows Activation Technology

What are Windows Loader and RemoveWAT?
Windows Loader is the loader application thats used by millions of people worldwide, well known for passing Microsoft's WAT (Windows Activation Technologies) and is arguably the safest Windows activation exploit ever created. The application itself injects a SLIC (Software Licensing Description Table) into your system before Windows boots, this is what fools Windows into thinking it's genuine.
The easy and safe way to activate Windows.

RemoveWAT v.2.2.6.0, developed by Hazar and nononsence, is a Windows 7 crack that completely removes Windows Activation Technologies from the system so that users can validate the illegal pirated copies of Windows 7 as genuine status.