[CentOS] CentOS 7 Manual Install

I am following the instructions from the CentOS website to manually install
CentOS 7 (http://wiki.centos.org/HowTos/ManualInstall) but the guide seems
to have some quality issues. I've partitioned the storage fine and now onto
setting up RPM. Unfortunately I am at a loss on how to do this. I am doing
this on VMware Workstation 10 and the host OS is Ubuntu 14.04.

Thanks

Parvez