Re: GNU GRUB on startup, no CD
So you want to install Windows XP as well, and dual-boot?
If that is the case, then, if you have a Windows Key for XP/Vista/7/8, you can download the version the key is for, say, Windows Vista Home Premium and use the Key you have to activate it.
If you are going to dual boot then I suggest that you Install Windows First and on the FIRST PARTITION of your HDD. CREATE & FORMAT partitions for Windows with Windows Install Disc ONLY.
After that you can install Ubuntu. But first tell us CLEARLY how you want to set up your computer, Ubuntu only or Dual boot Windows and Ubuntu or just Windows. Only then we'll be able to guide you in the right direction.
"Evolution is Nature's way of issuing upgrades."