NO warning of not enough space on usb-stick

Hi.
I used unetbootin-windows-575 on WinXP Home with a SMALL usb-stick (256MB) with the iso the 2012_06_07 version of PartedMagic.
ON the usb-stick was an previous version of PartedMagic (v 4.5).

As I try to boot on a netbook, i got the following error:
Mounting pmagic-xxx.sqfs...mount: wrong fs type,bad option,bad superblock on /dev/loop1...

If I try:
dmesg | tail

I got an
SQUASHFS error

so, no idea what to do. Read here and there...
The Message from:
Patrick Verner » Thu Jun 16, 2011 12:14 am
gave me the right hint: After i compare PMAGIC_2012_06_07.SQFS in the origimal *.iso and the on on the usb-stick i realize that the SIZE of the usb-stored was ONLY 97 MB instead of 158 MB. Than i saw that the free space left on the sick was only 7kb and I KNOW what was wrong!
The program unetbootin-windows-575 did NOT tell me, that there is not enough space on the usb-stick.

Solution:
I deleted the PMAGIC_4.5.SQFS which was still on the stick and got the needed space. Copy manualy the WHOLE PMAGIC_2012_06_07.SQFS to the stick overwriting the existing file and everything works well.

Thanks for reading.