12.10 installation with LUKS encryption & LVM in EFI mode

Question

I'm trying to figure out how to perform an installation of Ubuntu 12.10 (in UEFI mode) with LUKS encryption and LVM scheme. What I've done so far:

1. Booted on a GParted Live CD 0.14.1-6 in "UEFI mode only" (in the BIOS settings);

2. Created a GPT partition table with GParted;

3. Created one FAT32 partition of 250 Mo at the beginning of the disk as "primary partition" with "boot" flag and "cylinder align" with GParted;

4. Rebooted the PC with an Ubuntu 12.10 64-bit DVD in "EFI mode only" (same BIOS settings);

5. Used "something else" option for installation type during the partitioning step;

6. Selected my free space and created a "Physical Volume for Encryption";

7. Set my key for the encrypted container.

Now I'm stuck there and can't figure out how to:

• Find how to create manually the LVM Physical volume, Volume Group and Logical volumes with this graphical installer;
• Determine what should I select for the bootloader (entire volume, sda_crypt volume...)

This topic is related to a brand new Ubuntu 12.10 installation, I opened a previous one for 12.04.1 installation here