Welcome to the forum...
You have to shoot from a single location and (probably) use a spherical projection when rendering.
You will probably need a fisheye lens and you will need a proper pano head.
What a camera and lens are you using at the moment?
Are you intending for the person viewing the pano on the web site to be able to pano and zoom on the panoramic images?
When you are photographing a 12 foot length of wall from 5 feet there's bound to to be distortion because of the field of view (you have to be able to get much further way to reduce that).http://www.cambridgeincolour.com/tutori ... ctions.htm
But if you use Panotour/Panotour Pro to prepare the images fro use online the viewer will acommodate that.