Reply to Phil McClean:
You get extra classes Other_Locus, Genome_Sequence, cDNA_Sequence ...
in your main display window. These are subclasses defined as being
visible in wspec/subclasses.wrm, which make sense for the C. elegans
data set. Either delete subclasses.wrm, or delete the things you
don't want and add subclasses you do want. A subclass consists of all
the items in a class that satisfy a query, called the "Filter" in
subclasses.wrm, which is in .ace file format. The subclasses.wrm file
is read whenever the models.wrm file is read.