Middleton bios update in linux via usb

[neurod]

Title is pretty self explanatory. I'm running linux mint 17 64 on a x61T.
Ive tried to put the iso on a usb with unetbootin; made a freedos usb with unetbootin then transferred the middleton folder contents to the usb; I've tried the geteltorito method; tried a converti-iso script on the think wiki. All with no success to get a working usb boot with middleton.

I've been googling with no luck. Has anyone here made a middleton bios boot disk with a usb on linux? I cannot find a simple, standardized method.

Any insight would be great
Cheers and thanks!

[neurod]

I gave up on trying to make it on linux.
I booted into a win7 box and made a disk with the hp app, which worked perfeectly.