[CentOS] unison versus rsync

>Check out HPN-SSH, I use it extensively to transfer files over
>ssh, it provides a null cipher which you can use to disable
>encryption of data, while still maintaining encryption of
>authentication credentials.
>
>http://www.psc.edu/networking/projects/hpn-ssh/
>
>I transfer over a terrabyte of data a day using rsync+hpnssh.

Nate,
That looks impressive, I would love to use that for other needs as well.
How exactly do you go about installing this under CentOS? I can
pretty well assume that patching the stock rpm would not work:)

Thanks!
jlc