I want to install knoppix to hard drive and it says as below.

own - Zero Work Needed
(C) 2007-2008 Erik Auerswald <auerswald@knoppdf.net>
(C) 2006 Martin Oehler <oehler@knopper.net>

This program installs Debian/Knoppix to HD. Since repartitioning and formatting of partitions
is necessary for this task. IT CAN DESTROY EVERYTHING ON YOUR COMPUTER DISKS.Make sure you have
a backup of all important data.

PLEASE STOP NOW IF YOU ARE NOT 100% SURE.

----->i want to post the screen shot but i dont know how....

so I was afraid to continue the installation because of the post ... because in my opinion, the partition will be created automatically by knoppix (my english is not very good) ....
whether knoppix allow to create custom partition or something ...?
or whether it is auto ...?
thank you ...