Hello, Before anyone can help, can you answer a few questions?
First, what exactly do you mean " almost intact"?
Second, do you know what kind of snake it is? This is important since the temperature, humidity and incubation period can varry between species quite a bit. Secondly, if you have eggs from a venomous snake, you need to know that as the babies are fully capable of inflicting fatal bites right out of the egg.
If you want to try anyway, you need a plastic food type container with a lid, some vermiculite ( a type of potting soil) or sphagnum moss. Drill some holes in the container and lid for air. Mix the soil with fre water 1 to 1 by weight NOT volume. Place the eggs partially buried, about halfway covered in the mix and keep it heated between 82 and 85 degrees F. Sorry, don't know the exact celsius conversion but maybe around 25? The eggs may partly collapse, which should be OK, though they would generally swell. Right before hatching they will collapse a bit, then the babies will slit the egg and start coming out. Between slitting and completely coming out can take a whole day. If any eggs get moldy or smelly throw them out. Once the babies are out of the egg, if you still do not know what type they are, take some pictures and post them for an ID BEFORE you try to touch them. They may need 3 or more months to hatch.
Good Luck,
Drew