excellent work - could I suggest including an already adapted Garland theme page_tpl.php fot those who just want a quick start. It is really a really powerful menu system but rather daugnting for the newby!
So the readme.txt would just be expanded along the lines
"if you just want to 'upgrade Garland primary links' simply rename page_tpl.php to originalpage_tpl.php and replace with the version supplied with this module"
what do you think?