cross-referencing between files

Hi I've been googling about how to do cross-referencing between two lyx documents. None of the solutions I've seen so far worked for me. My attempts consisted of having a master lyx file which includes (Insert->File->Child document, include type=include) two other lyx files. Then I try to refer

\thanks numbering

Hi in an author list, footnotes are translated to \thanks, which I'm using for affiliations. How do I get the corresponding footnotes to be numbered? Thank you. Ramiro