The data should be in your monitor manual. Best to have the actual monitor guide. Also you should know what type of video card you have. If you have MS-DOS 6.0 or later, the MSD program will give you that information. In Linux, a program called SuperProbe will also tell you.
Installation is relatively easy, but is only half the job.
Again, all this applies to Slackware Professional. The program will first ask for information about your mouse, if you have one. The guides suggest this, saying that only if you have an older Logitech mouse should you choose the Logitech option. Onward to video cards. From the massive list, I chose the Cirrus GD-5426.