Preseed for Wheezy - Sizes, Labels and Logicals

[<ray@aarden.us>]

The partman auto instructions say that with partition 'max' parameter
set to 1000000000, all remaining space on the disk will be used.  Then
it says that there is a partition size limit of 1000000000 due to the
32-bit shell integer limitation.

I am installng a 64-bit version.  So, what are the limitations for
64-bit?  I want to set a 16GB partition.  How can I define a 16GB
partition?  How can I allocate the remaining unused space with method{
keep }?

The partman auto instructions say how to label a partitions, but I did
not see a way to label the disk.  Is there a way to label the disk?

The partman auto instructions shows how to define a partition as
primary, but there wasn't a description of how to define logical
partitions.

My intent was to have four primary partitions, each bootable for four
different multi-boots.  How do I associate any one /boot with a / or
other mount point?  After experiementing with this configuration, my
plan is to convert the system to Xen.  There is not intent to multi-boot
with Xen.  Is there any value in this multi-partition setup like this
for VMs?

ray