Download the Home bootable CD @ http://www.partitionwizard.com/download.html
It's a mini tool that can wipe your data, start over, and repartition, set to Logical, and Active after the wipe/format it done.
Then install Win 7. Remember, don't expect Win 7 or Win XP to install all your drivers. You would need to gather your hardware specs, and get the necessary drivers for your specific hardware as well as your x64 or x86 platform.
The key to a successful re-installation of Windows, is writing down the hardware specs, so that it's easier to get the drivers, and or having a back of your most recent drivers for your system, that way, when your done installing Win 7, you'd be on your way to installing the drivers.
What's your hardware? e.g. Desktop, Laptop, and what platform, e.g. x64 or x86.