I would start with this - they are very easy tutorials to follow: apcmag.com/how_to_dualboot_vista_with_linux_linux_is_already_installed.htm
So I bought a Dell Inspiron N5110 with Windows 7 from Best Buy a year or so ago and I installed Ubuntu Linux on it. I would like to install Windows Vista over Ubuntu for development purposes. How can I create a dual boot or install Vista over it? I have the Windows Vista Home Premium x86 dvd-rom.  Can someone please help me? :emotion-10:
Install Vista - Inspiron N5110 (after Ubuntu 11.10)