Originally Posted by FrozenK

You don't need studs to ride on snow. They really do nothing for you. On ice, yes you need them. Snow? No.

If you want to do your own, there are comercial available options like Gripstud (Tire Studs | Grip StudsŪ Screw-In Tire Studs | Traction in Ice, Snow and Dirt) that are more convenient than the sheet metal screw/ drill method. But they will cost you as much as buying a studded tire. Which again you won't need in snow.

If you are dealing with snow, not ice, use the widest tire you can fit on the the widest rim you can.