How do I turn a bootable usb thumb drive into a PXE bootable image

Question

I have a USB thumb drive containing a live boot environment.

It's actually set up like a HDD with a single ext2 partition within and boots a minimal customized version of linux.

How would I go about setting this up to boot via PXE (or iPXE)

Solution

If you've got a functioning PXE server, you should have no problem using memdisk with an image of the drive. I've used memdisk to boot a hybrid ISO over PXE, serving the ISO over TFTP rather than NFS.

Comments

[hookenz]

Thanks, this is the right answer. Now to get around the 32MB file size limit in freenas!