DOSBox is a DOS emulator that will allow you to run old games on modern systems. You can find a link to the download here
http://www.abandonia.com/main.php?nav=programs
Also, in my signature, there is a link, click it for a walkthrough on how to set it up.
Feel free to browse the forums for answers if you should have any problems, and if you can't find the answers, feel free to post the problems you are having in Troubleshooting. Please include exact error messages and descriptions of the problems as well as an exact/detailed description of what you did when you got those problems.