4-CD set

[Robert Storey]

I've noticed that the FreeBSD 4-CD set is now available for 5.1-RELEASE
from FreeBSDmall.com for $40. I'm willing to order it and support the
cause, but nowhere have I been able to find out just what is on the
additional two CDs. Is it the ports collection, or source code, or
something else? If anyone has previously purchased a 4-CD set, I'd be
interested to hear what advantage it offers over the downloadable 2-CD
set.

TIA,
Robert