Partman manual configuration?

[Peter Smith]

Hello

I am installing Ubuntu 10.04 with the ubuntu-10.04-alternate-i386 CD
as i need to configure an encrypted root volume without LVM. The disk
is an Intel X25-M SSD so the partitions needs to be aligned, i
configure language and keyboard settings, then i activate another
console with ALT+F2 and use fdisk to partition the disk correctly. The
console is closed and i continue with the installation on ALT+F1.
After a few configuration steps partman is loaded by the installer, i
choose "Manual" and the partitions created earlier with fdisk are
shown. Now my problem is that dm-crypt needs to be aligned also by
setting a custom LUKS "Payload offset" this is not possible from
within partman and if i try to configure LUKS in another console
before partman is loaded, the volume is not detected when partman is
started. The custom LUKS "Payload offset" can be created with the
command "cryptsetup luksFormat --align-payload=VALUE". Also the
filesystem needs to be aligned, but this is not possible from within
Partman either.

Does anybody have any suggestions on how to solve this problem? Is it
possible to disable partman under the installation?