You might ask theDamian if he'd be willing to include some standard grammars in the Parse::RecDescent tarball-- in addition to the demos folder, a templates folder might be handy...

If theDamian or someone else tells you that this does not seem to be a good idea, you can give him the hint that this kind of work was already done for regular grammars by theDamian (now maintained by Abigail).

Hanamaki;-)