Force a package to load early

[Paul A . Rubin]

Hi,

I'm trying to cobble together a module that would load etex.sty before xy.sty,
which LyX automagically loads. The problem is that you can't use XY-pic with
Beamer unless you load etex first.  Since etex is apparently not a "feature" (in
latexfeatures.cpp), "Requires" doesn't buy me anything. Is there some other way
in a module to force a \RequirePackage at the top of the document?

Thanks,
Paul