Do scripts exist for this? I can only find common pathway models for continuous data, such as the one available at the Mx Scripts LIbrary at http://www.psy.vu.nl/mxbib/index.php?page=mx_tree&tree_list=1,2,21,23,29...
The VU site you link to has, I believe, only ClassicMx scripts at this point. The Boulder workshop site (http://ibg.colorado.edu/dokuwiki/doku.php?id=workshop:2010:start) has common pathway models (somewhere in the multivariate sessions taught on Wednesday) but again that may only be for continuous data. Fortunately, modifying the scripts for ordinal data should be relatively straightforward, by comparing the univariate ACE models for continuous data with the univariate ACE model for ordinal data.