[CentOS] Multiple Linux instances on the same box - dual/triple/etc boot ?

Hi List;

I have a new dev server. As an independent consultant I want to maximize it's use. Some of my clients use RedHat/CentOS 64 bit, others Redhat/CentOS 32bit, some are even using Fedora and Debian.

Here's my thought:

I'd like to install each OS/version into it's own space on the disk. I'm thinking all I have to do is install one OS (say CentOS 64bit) and partition say 20% of the disk. Then once the install is done, boot into the latest fedora disk and do the same, etc.

Is this correct ?

Later I want to add a disk array and allocate a RAID mount point that can be mounted by any of the installed Linux'es when it's active.

Is this do-able ? Easily ?

Thanks in advance...