Well, there are lots of issues here, so I'll just answer your original question...there MIGHT be a way to do it through your graphics driver/properties. Most graphic utilities (like NVidia Control Panel) allow you to set "profiles" for each individual game.
I'll just assume Nvidia, but AMD should have something similar. On the Nvidia Control Panel, find the Manage 3d Profiles on the left. Once you click that you should see two tabs: Global and Program Settings. Go to the Program Settings tab, and find your game. Now look for a setting called "VSync". You can set this to 60 for your game.
That doesn't change your MONITOR settings, but it will limit the game to running at 60fps...which should be NO PROBLEM on a 75hz monitor, but there ya go. Hope that helps.