Tady se to řeší nějakým zásahem do registru, ale neumím anglicky.
http://www.techspot.com/vb/all/windows/t-18736-Why- is-it-not-possible-to-partition-a-USB-Flash-Stick.h tml

Ok XP can only see one partition on a removable USB but if change the USB driver to a fixed disk driver then XP will see it as a hard drive then we can have lay down multiple partitions as we like. Now open regedit and goto HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\USBST OR
and double click on USBSTORE and you see a subkey below it, select the first subkey below USBSTORE and right click and select Copy Key Name

Here is mine, yours maybe different.

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet00 1\Enum\USBSTOR\Disk&Ven_Generic&Prod_USB_Flash_Disk &Rev_0.00

Now we need only need this part:

USBSTOR\Disk&Ven_Generic&Prod_USB_Flash_Dis k&Rev_0.00

Copy and paste it temporarily into notepad.

You will now need this driver. http://www.xpefiles.com/viewtopic.php?t=92
Unpack it to a folder on your desktop. Inside the folder is the file cfadisk.inf. You need to open this file and scroll down to you see the line %Microdrive_devdesc% = cfadisk_install, specific data
Now you need to replace all lines %Microdrive_devdesc% = cfadisk_install, specific data with
the line you copied from your registry like so.

%Microdrive_devdesc% = cfadisk_install,USBSTOR\Disk&Ven_Generic&Prod_USB_ Flash_Disk&Rev_0.00

There could be more lines so replace all and save the file.

Goto Device Manager and click on disk drives. You see your USB listed, dbl click on it and goto the driver tab and click update driver and install from a specific location and choose the driver to install and click on Have Disk and browse to the cfadisk.inf file your modified driver on your desktop and force that to replace your existing driver. It might ask you to reboot. You should now have your USB showing as Local Disk

More info here (http://www.msfn.org/board/index.php?act=ST&f=82&t=6 9211&st=0#entry474505)

Its Work :)