I just added a new FAQ (Is it possible to use a pre-existing XMPP/Jabber account of the form email@example.com with Kontalk clients?)
Maybe someone want review it.
I also added a link from/to desktopclient help page to android help page into the side bar.
@abika I think we should the desktopclient help page split into more pages (FAQ,developement and so on) like for android clent. What do you think?
I can do that in smal steps from time to time