[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,