After trying Datacolor support I got the answer. Didnt expect to much but they were pretty good and fast response.
Unfortunately because you are running Windows XP you will only be able to load a single profile onto your video card at any one time.
This is a limitation of Windows XP and where as it only supports the use a a single LUT(look up table) on a video card. The LUT is where a monitors icc profile is located. Regardless if the video card supports dual LUTs and dual displays Windows XP can only use one LUT at a time. Thus in XP the only way to have dual displays with there own separate profiles is to use two video cards. Which is unfortunately not an option for you as you are using a laptop. Both Vista and Windows 7 do not have such a limitation.
I assume that the BenQ is the display you would like to have profiled.
To reset display settings please start up the Spyder3Pro software and in the Menu bar select: Go/Edit Display Information
Now you should be able to start over and select your BenQ as the display with which the profile will be created for.
Hope this helps and please let us know if you have any further questions.