Knoppix 7.2 USB Flash Installer issue

[Werner P. Schulz]

Using pendrivelinux.com Universal USB installer tool, I specified the distro as Knoppix and pointed to my Knoppix .iso file. I chose the "format" option for a new FAT32 format...
The resulting partitions appeared identical to those created by the Knoppix Flash Installer,..
The result was a bootable flash drive, recognized by the Dell BIOS as USB-HDD0.

I've tried this by myself and I've found only one difference:
Knoppix formats the first partition as W95 FAT32 but Pendrive against it as W95 FAT32 (LBA).

With my old Laptop I can neither boot with the USB stick formatted by Knoppix nor by Pendrive. Perhaps this is the difference with your Dell.