Here is how you can create a bootable USB Drive with windows 7 setup on it.
Follow are some requirements in order to use this tool
1. You will need a USB Drive ( Size 4GB or more )
2. You will need Windows 7, Vista or Server 2008 DVD Drive or ISO Image
3. You will need Windows Vista or Server 2008 or Windows 7 to run this tool
Either select the DVD Drive option or ISO Image option depending on your requirement and once the process is complete, you can use the bootable USB Drive t install windows 7 or Vista or Server 2008 – but you will need to make sure that the computer or laptop on which you want to install windows 7 should support booting with a USB Drive, you can check the same in BOIS settings.
Download Bootable USB Drive Creator (Rapidshare) | Download Bootable USB Drive Creator (Mediafire) | Download Bootable USB Drive Creator (Skydrive)