The instal.sh script does allow you to choose where you want to install BT4. Here's a tutorial from the official site (that you're on right now).
Tut. It includes screenshots.
I have a machine that has 2 partitions as follows.
SCSI = /dev/sda
/dev/sda1 = WIN7
/dev/sda2 = (set aside for BT4)
I am using the install script from the CD boot up off the Desktop. But the scripts always wants to use the /dev/sda1 partition to install BT4. Is there anyway to force the install to the selected partition on /dev/sda2?
I remember a script that was used in a BT3 video that was presented on the offensive security site. Is there any scripts to force the install of alive CD to a specific partition.