Some morphs don't require the morph pack and are new morphs created for a character. Others are dial spins using the morph packs. Right now, the morph packs are on sale for $3 (part of their oldies sale) at DAZ, so it's probably worth getting. If only one can be afforded, the head pack is the one used most often.

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon