I've updated the pclos_usbboot.img in this collection to make it even easier to use and more intuitive.
I've finally put together a disk image for a floppy that will let you boot from an attached USB CD ROM device even if your system BIOS doesn't support it. To use it, after the USB device has been detected and the A: prompt appears, type in linux.bat and hit enter. It's included in the set of zipped floppy images at this address;
New link for the files:http://rapidshare.de/files/47816001/Floppies.zip.html
Here's the text that goes with the images;
There are seven floppy images in this folder.
(1) A pclos_usbboot floppy which allows you to boot PCLinuxOS and it's variants from an external USB CDROM drive on computers which do not natively boot from USB.
(2) dban is Darik's Boot and Nuke which you can use to write a drive to zeros or reinitialize a drive.
(3) sbm is SmartBootManager which allows you to boot from CDROMs and other drives which aren't bootable on certain older machines.
(4) A completely blank floppy which you can use on Linux machines which won't format floppies to FAT file systems.
(5) A Windows 98 floppy with system files only, which can be used when you need to redo the BIOS on a machine which has a non-Windows OS.
(6) A usb-boot floppy which can boot some USB devices and modified to boot others.
(7) A full Windows 98se boot floppy.
To make a floppy from one of the image files open a terminal and enter
dd if=folder/filename.img of=/dev/fd0
and the dd (Data Definition) program will write the image from the folder in your home directory on to floppy A:.
POSTSCRIPT: I've succeeded in making a floppy that will boot a live installation on a fat formatted thumb drive on machines which don't allow booting USB natively. When I get it refined I'll put up a new post with it. It is only for pclos and it's derivatives .