Remember that the Sierra DOS games can easily be run in DOSBox on Win64, Mac OSX, Linux, etc. Check my site for new installers that will setup the games in DOSBox for you. http://www.sierrahelp.com/Patches-Updates/DOSBoxInstallers.html
It is the few Windows only games that are a problem. For some of those, see http://www.squirtthecat.com/ for new installers.