Including a document into another one without redefining setting

Including a document into another one without redefining setting

For a publication, I have to include another publication. The second one is in English and uses IEEEtr style.
I could of course compile the second one into a pdf file and include the pdf into the second one, but then the page numbers won't match.
Removing the header data of the second file is'nt really an option because the settings are quite different (other language, style, definitions, content)...