[PLUG] Problem with Solaris Installation

[Ashutosh Adkar]

 I have an 80 GB Hard Disk.
I have Windows XP already installed.
The HDD is divided into the following partitions :
C: 10 GB
D: 20 GB
E: 20 GB
F: 20 GB

10 GB of unused space.

I wish to install Solaris 10 in this unused space.

The trouble is Solaris does not show this unused space...
I just shows,
10 GB Unknown
67 GB FATEXTLBA (or something like that)
with 8 MB of unused space.

Whats goin on?
Please help.
Thanks in advance.

-- 
Regards,
Ashutosh Adkar