[Unattended] Only 4 GB HDD is available

Hello,

now, I have a working unattended installation, but I just realized that 
the maximum partition size is 4 GB although I have a 32 GB HDD?
Additionally, is gets formatted with fat32...
How can I get bigger partitions as 4 GB is not enough for a working copy 
of Win XP and my needed programs?
btw.. I added in the unattended.tx file in the lib folder this code too:
[_meta]
     fdisk_lba=1

Thx, regards,
Daniel Mühlbachler

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