I think it would be nice to make scores of this this category easy to find, but do they deserve a template or a new category? I apologize if this feature is less interesting than scores scanned by a specific library, scores of a specific collection, WIMA collection etc.
Because this would be specific to a particular score as opposed to a composition I think it would be best to use a template in the miscellaneous notes area that would both display text explaining its inclusion in the "movable type" category (with a link) and place it in the category itself. Here's an example of the code for the template but I have no idea what would be the best name for the category:
This item is included in the category [[:Category:Scores printed with movable type|''Scores printed with movable type'']].<includeonly>[[Category:Scores printed with movable type]]</includeonly><noinclude>[[Category:Miscellaneous templates|s]]</noinclude>
Thanks. How can I simplfy the comment on the work pages into: This score was printed with movable type? See the current status of this template starting from http://imslp.org/wiki/Lieto_addio_(Galli,_Amintore)
I've made the change. At the beginning of the template you would replace "This item is included in the category" with "This score was printed with" and then inside the category link you would eliminate "Scores printed with" so that movable type remains as a link to the category.