In the tutorial, you will see that you can do this from booting from your Vista installation DVD to run the Startup Repair to add Vista back. Afterwards, you can use the other tutorials to adjust as needed if you wanted to.
System Manufacturer/Model Number Intel OS Windows 7 Ultimate SP1 RC X64 CPU Core Two Duo 2.88 ghz Motherboard Intel DQ series Memory DDR2 4.0 Gbs Graphics Card Nvidia Monitor(s) Displays Acer 24' & Acer 19'
Keyboard Apple Wired Keyboard Mouse Microsoft Wheel Optical Laser Case Intel Tower Case Hard Drives 1tb (Internal) & WD 500gb (External)
Can't boot into vista after downloading windows 7 problems?