[CentOS] Installing rather than changing

After reading the replies to my message about changing from RHEL to 
CentOS I think it might be easier to install the latest version of 
CentOS from scratch. I can save my home directory and my e-mail setup. 
My access to the present system is by ssh. How can I download everything 
with ssh then start the install? Since I am blind, I may need sighted 
help during the actual install process. Is it possible to specify 
answers to the questions wich the install will ask beforehand?

Pardon the dumb questions. I want to get the process completed with as 
little interference to my software development work as possible.

Thanks,
-- 
John J. Boyer; President, Chief Software Developer
Abilitiessoft, Inc.
http://www.abilitiessoft.com
Madison, Wisconsin USA
Developing software for people with disabilities