thejammy, if your graphics card has an analog output and the lcd has an analog input, they can work together.
If your graphics card can connect to a regular CRT, then it has an analog output. Most of the cheaper LCD's have an analog input.
Fancier LCD's have a digital input. In this case you would need a graphics card with a digital output. Moreover, there are several different types of digital output, so you might need to buy a connector adapter gizmo in some cases.
Some LCD's have two inputs: one analog and one digital.
Botom line: if your graphics card works with a regular CRT, it will also work with a (somewhat cheap) LCD since the lcd will have an analog input.
LCD's work with 3D accelerated games, though nothing can beat the colors and response time of CRT's when it comes to games and movies.