Please help How can I mount the partition that I booted knoppix.iso in Knoppix

Hi all..
I am new on Linux.
I prepared an usb flash includes diffrent Knoppix Distros.
I used Grub4Dos for boot Knoppıx 7.05 DVD.iso
My USB flash is like this.
====================
grldr
menu.lst
...
etc
ISO <Folder>
Knoppix.iso
Slax.iso
...
Etc
==================
I succesfully booted Knoppix. But after I booted Knoppix, I see that My USB Flash drive is not shown completely. Only content of Knoppix.iso is accessible.

When I check from Gparted , I shows me : /dev/sdb1 mounted /mnt-iso
I need to access whole usb stick.
How can I manage this ?

Thank you in advance...