Datacolor User to User Support Group.

OK, that was an extremely informative thread, especially thinks to
David Tobie.

Now, allow me to me rephrase the main question.

"Assuming that the two monitors can be independantly calibrated" what
is the best way to achieve visually matching colors on both monitors
using Spyder2 Pro software? For my purposes the monitors are identical
LCD, but I would like to know a more general answer as well.

Here's my guess: calibrate both monitors and chose the "best". Save
it's settings as a target. Load this target for the second monitor and
recalibrate it. Adjust RGB sliders in the process ignoring the
software warning. You can use this target file for other computers as
well.

I am specifically interested in visually color matching two monitors.

By now I have a very good understanding of XP color issues but please
let's leave it aside. My next computer would be PCIe regardless of the
color management issue. For the time being I'll settle for the best I
can have under the circumstances.