I have ended up doing two things:
In pp-inc I inserted this line under "//default style settings"
$Style['grey'] = "grey";
With my sincere lack of knowledge, I ofcourse do not know if it made any difference
then for my links I did this:
<a href="/gallery/showcat.php/cat/3">Dining and Bar</a>
<a href="/gallery/showcat.php/cat/4">General Household</a>
gosh - it took me forever to figure out - but it is working!!
Thanks Chuck for all your info - I am learning as I go along!