[2005] web parts question

the company that I work for has landed a deal to create a website, but the people that want this website what it so they can customize it. can i do with this web parts meaing... an administrator would log in add, edit and remove content such as documentation, pictures, links, etc... can i do this with web parts in that they would be able to add things to the different zones and pages and when a normal user comes to the site they wouldn't be able to change anything but the page would look like it should once the administrator has done something to it

It depends on what they want to customize. Depending on those customization specifications, you may or may not need it.