Where is the: create,install to RAID(0-5) option?

[Chris H]

Greetings,
FreeBSD appears to have issues installing to an ATA drive/device (UDMA) -
see the: ATA DMA issues - are there problems lurking in 7.1? thread for
more detail. I've been using FreeBSD for a few years on several Tyan
Serverworks Thunder LE-T boards (S2518UGN) on the embeded SCSI (Adaptec)
ports w/o any problem. But recently purchased a couple of UDMA166 drives
to install FBSD to. This proved to be impossible. Installation proceeded
w/o incident, but using it proved impossible due to "timeout" messages
that ultimately resulted in failure. So, I now find myself in need of
striping several SCSI drives to achieve the capacity required to achieve
the desired install base. But as yet there is no option to create/install
to (software) RAID in the FreeBSD install. I've done /much/ searching on
the topic. All the reading I've done from the results found have left me
with more questions, than answers. Has anyone created a (pre)install CD
that facilitates this process? The closest I've discovered is:
http://www.freenas.org/index.php?option=com_frontpage&Itemid=1 (FreeNAS).
But the documentation for the "SoftwareRAID" is out of date, and I was unable
to register on their Forum. Is there a good article/recipe that anyone knows
of for creating/installing FreeBSD to RAID0? The closest articles I could
find were:
http://www.freebsd.org/doc/en_US.ISO8859-1/articles/remote-install/installation.html

and

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-striping.html

this one was good, but I wasn't sure how to do this from the install CD,
and it appears to presume that a system is already installed.
lastly, I found this one:

http://people.freebsd.org/~rse/mirror/

I apologize in advance should this been better posted somewhere else, but
I'm already subscribed to this list, and it involves problems installing
7 - or any other release on an ATA device.

Thank you for all your time and consideration.

Sincerely,
Chris