5.2.1 install wont see sata raid

[Ryan Pekarik]

I am using a via:VT8237 on board raid controller running sata raid0 on 2 250GB hds.  I have 10GB set aside.. and when i boot to the fbsd cd ISO, the drives show up seperate.  sysinstall doesnt give me the option to install on a raid.  Is there a loader option or something else I am missing.  I am having trouble finding support for vt8237 sata raid.

However it does say its support: http://www.freebsd.org/cgi/man.cgi?query=ata&sektion=4&manpath=FreeBSD+5.2.1-RELEASE

thx
Ryan