It is fairly easy to make a portable version yourself. Download the
installer and install (without miktex). Then copy the lyx folder to your
usb-stick, download miktex portable and extract it to that folder. After
that open lyx/Resources/lyxrc.dist and add ;$LyXDir\miktex\miktex\bin at the
end of
Maybe it would be a great idea to have a portable version of LyX that
works without installation, e.g. from USB-stick. The settings should
be able to save in a single settings-file that can be loaded manually
or (if it is in the same directory as the programfile) is loaded
automatically.
If