dual monitor??

Trying to make some extra $$ with karaoke. XP pro & home is supposed to have dual monitor. I have both Pro and Home and neither have it. One is a laptop (older Dell latitude) and one is a few years old desktop. My wife's xp pro has dual monitor. What gives???
Thanks, Elizabeth, but I was pretty much already on that path. I tried going out from laptop RGB to my newer monitor but the laptop still only showed one monitor. Restarted and all. Then I moved up to our 1 year old LG smart TV. Same thing. Even used the "out to tv" s-video port to the tv, again, laptop only shows one monitor available. Could it be a service pack issue? My desktop is 2002 Windows XP PRO SP3, yet that only shows one monitor as well.