Hi itpaladin1 and
Firstly i would suggest a look at the following article:
http://www.wsgf.org/article/red-vs-green-vs-blue-v2The article is helpful to get a better grasp of the different technologies that will allow you to achieve a Triple monitor rig.
Secondly I do have to agree with what Haldi said earlier...
To my knowlage one GTX460 card will not support Triple monitor setup, for this you would require a Second card in SLI.
I do not know if you need adapters with the nvidia card. Personly I have only been running AMD based Triple monitor rigs and so far and with the AMD cards one have been required to have adapters (at least for the reference models of the cards).
hope it helps and if you have any more questions i will do my best to answer what i can.