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I had a question regarding dual boot with windowsXP and centOS 4.7, right now I only have windowsXP and I was thinking about formatting my disc and installing WindowsXP and CentOS after that (I was told it's best to install Windows first). I'd like to be able to choose which OS will boot every time I turn on my PC. This was the advice I received: "In Windows, leave the unallocated disk space as "unallocated". This is going to be the "free space" to which you are going to install CentOS. Start CentOS install by booting from the CD media. Follow the instructions. When it comes to the disk partitioning step, select the "Use free space on.." option. You can see what the selection page looks like in the Installation guide: http://www.centos.org/docs/5/html/5.2/Installation_Guide/s1-diskpartauto-x86.html At a later step, you will be asked where you want the bootloader to be installed. Choose the "MBR". You will also have a chance to add your Windows as a boot option. You will be choosing either CentOS or Windows as the default OS." I can't find anything in the documentation, I know it has to do with GRUB but even if I manage to add Windows as a boot option (how?) I don't know how do I configure it so that I can choose at startup which OS boots. Thanks

I didn't know Grub automatically set it so that I can choose which system boots up every time. I've already installed Windows in a partition leaving 50Gb for Linux but now when I restart with the first CentOS CD in the drive it doesn't ask me if I want to boot from the CD (as it did when I installed windows)