first please excuse my poor english.
LyX is a document processor that encourages an approach to writing based on the structure of your documents (WYSIWYM) and not simply their appearance (WYSIWYG): http://www.lyx.org.
Some years befor there has been topics about a portable LyX in PortableApps. But they didn't induce a portable Lyx.
On http://code.google.com/p/lytex/ there has been a portable Lyx für a while. It worked well, but it is abandoned now.
LyX had a a great leap forward now with the version 2.0, that was published this month.
I suggest to create a portable Lyx:
Lyx needs for running some other programs (see http://wiki.lyx.org/Windows/LyXWinInstaller). I myself never made a portable app before. Is someone here who agrees to create a portable LyX?