Clean Install of Win7

Hello i have a macbook, with Leopars OS.
And i want Win7 ultimate.

How do i install from the cd?

Used Bootcamp just as you would with XP. You will need your Windows 7 and OSX disks to complete this.

Applications - Utilities - Bootcamp

follow on screen instructions, set your HD partition to at least 15 GB

when you get to the Windows install make sure you install to the Boot camp partition.

As soon as Windows 7 is done run Boot Camp update when in windows to get the latest drivers.

There are some videos on You tube as well that help

Same idea slightly different wording...

Alternatively use Disk Utility and create a MSDOS (FAT) partition for the windows install.
Insert the Windows 7 DVD.
Restart while holding down c key to boot off install disk.
As mentioned make sure you select the correct partition
Install away!
Boot into Windows 7
Once done insert an OSX install disk (I believe it needs to be any Snow Leopard disk for Windows 7 but maybe Leopard is fine...).
Install the Boot Camp 3.0 drivers that show up on this disk under Windows.
Download and install Boot Camp update 3.1

Apple - Support - Boot Camp

Have a look at the FAQ and most importantly the install guide.