trouble with preseed partitioning

[Dale Sykora]

Hello,
  Not sure if this is the right list to ask for preseed help, so please
redirect me to a better source as needed.

  I'm trying to fully automate an ubuntu 10.4-amd64 desktop install in a
unique oem install environment.  The install environment is the os install
media are located on a small fat32 partition /dev/sda1 and the network may
not be available during the install.  I am using the alt cd iso, a custom
preseed, and the hd-media kernel/initrd.  The fat32 partition boots and
autoexec.bat launches linld.com with kernel/initrd/kernel options which
start the install.
  I can run install with preseed file but am always prompted to unmount
/dev/sda1 (fat32 partition where install is launched from) and to verify
changes to partition table (adding /dev/sda5 ext4 as / and /dev/sda6 as
swap).  I have extracted the installer options with debconf-get-selections
--installer > seed; debconf-get-selections >> seed and rerun the installer
with this seed file, but am still prompted about unmounting /dev/sda1 and
confirm partition changes.  Is there a way to preseed these choices so
installer will run without user intervention?  Is there a list of all
preseed commands/options?  I have found some info on a debian d-i wiki and a
few howto's but not a thorough source of preseed option/info.
  Thanks for any info that can help with my automation efforts.

Thanks,

Dale Sykora
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