Helpppppppppppp

what kind of car?
If you are mechanically inclined, its as easy as burger+fries....
1. Drain the coolant into a container.
2. Remove the upper/lower hoses from radiator.
3. Remove cooling fan(s) belt/blade.
4. Remove the radiator bolts wherever they are on the frame.
5.Replace the radiator, connect back all hoses and bolts, belt, fans/blade.
6. Refill radiator.
7. Start your car, check for leaks.