for a dynamic catalog with administration, you will need to use Data Assist and Security Assist.
Data Assist to create the catalog display pages and product admin pages, and security assist to restrict access to the admin pages.
see our eCommerce tutorials series for details:
http://www.webassist.com/tutorials/eCommerce-Overview-eCommerce-Series
It is geared towards using Data Bridge, but the underlying concepts are still valid with the stand versions of Data Assist and Security Assist.
"Another question I have is this. I build it in Dreamweaver but once uploaded to the server can we configure things from there?"
That is what creating the admin section will allow you to do, it is the purpose behind creating a dynamic database driven catalog and admin backend.
