How to get the Vaio SZ1XP to boot from a USB stick?

I got a Vaio SZ1XP (dual core CPU) recently. In the BIOS I did every thing (enable external boot, enabled UBS boot option, arranged boot order) you have to do to get the Vaio to boot from UBS stick.
It doesn't boot from the stick.
Sony e-support told me that they only support the OS which got delivered with the system the first place ... not very helpful.
Anyone knows how to do it?
BTW I would like to boot Linuy Puppy ...

Thanks
tommy51Asked:
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