[newbie] install from hard drive

[Jason Jesso]

I am currently running Redhat Linux 6.2 and I want to install Linux
Mandrake instead. How can I install Linux Mandrake from an existing file

system on an existing linux distro.

What do I name the directories to where I download the distro:
e.g. Mandrake/RPMS and
       Mandrake/base

Also make a boot disk for installation process.

??  I am I right here? Is there any documentation on how to do this?

Thanks

--
Jason Jesso