Hi Mark, along what Klaus said, a tarball of gmxtest for testing for gromacs 4.6 would be nice, we could use that in Gentoo Linux, too. @Klaus: in debian the data is split off in an Independent package. In Fedora something similar is done: <http://pkgs.fedoraproject.org/cgit/gromacs.git/tree/gromacs.spec> Cheers, Christoph