Check out this stuff. I'll update it as regularly as i can. If you want something done and shown here please feel free to let me know.
How to Change a Tire
1: Invest in some tyre levers! They make this dead easy.
2: Slide a lever under the sidewall of the tyre.
3: Progress round the wheel until you have one side off.
4: Same to the other side.
5: Get a new tyre and slide 1 side on then use the lever to get the sidewall in the rim.