[opensuse] using the standard dvd iso image(s) via usbkey usbstick?

I am uncertain about the current situation, but I used to write the
.iso image in the past year or so via windows and the suse studio
image writer to an empty usb key stick and then simply boot the system
this way instead of writing the iso image to an empty dvd.

I dont recall exactly where I had this instructions from but it simply
worked. But when I read the wiki pages these days, then it apparently
seems as if this iso image writing directly to the usb key was only
supposed to be for the livesystem iso images, and one needed to use
certain other additional tools like syslinux and something about
hybrid and such stuff I dont fully understand yet.

http://en.opensuse.org/Live_USB_stick#Bootable_USB_from_DVD_or_Net-install
<http://en.opensuse.org/Live_USB_stick#Bootable_USB_from_DVD_or_Net-install>

I am 100% certain that I tested opensuse 12.1 iso image directly
written to usbkey in a simple unaltered way via the
<https://github.com/downloads/openSUSE/kiwi/ImageWriter.exe>
https://github.com/downloads/openSUSE/kiwi/ImageWriter.exe

But I had trouble doing so with the recent 12.2 iso images.
Has anything changed as of lately how these iso images get built and
constructed by the opensuse developers and backends, or was I just
lucky in the past that it simply worked and now not working any more?

I also browsed through the bugreporting list archives of the recent
months, and there seem a number of odd bugs talking about usb iso
image not fully compatible and readable any more and about
installation or related problems and people also asking in this
direction.
Any have some definitive answers to this? Is it sufficient to write
the .iso image file as raw (sectors) to the usbkey via the suse studio
image writer (suppose its similar as if dd would raw dump it to the
usb key device from within linux).

And whats the whole deal about hybrid, and syslinux and all these
things mentioned in the wiki article that I posted above? I am
somewhat seriously confused.
Thanks for helping. Regards.
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