You can get to components by clicking on Setup > Build > Develop > Visualforce Components
Put in the label as "EX02_01ContactNameEditComp" and accept the default name.
Run your VF page and pass the contact id to it
https://c.na35.visual.force.com/apex/EX02_01ContactNameEditCompVF?id=0034100000K4b4b
Component
Click "New"Put in the label as "EX02_01ContactNameEditComp" and accept the default name.
VisualForce Page
Next create a VisualForce page "EX02_01ContactNameEditCompVF"https://c.na35.visual.force.com/apex/EX02_01ContactNameEditCompVF?id=0034100000K4b4b