As I said before, other hack packs and custom resources have already been added/used/implemented by builders. Say, for example, the merging of .2da tables, modification of added resources, game-wide conversation trees, access points to scripts etc. Many custom modules have their own resources already in place, and in order to work with other custom packages, some/a lot of work is needed on the user's side, provided the have the know how. That, aside of any personal modifications you may have done per module or globally. I use a set of custom packs that are specifically set to work in every module I still play. Finally, since the patch isn't modular, due to the way things work in NWN or the author's choice, you can't exactly choose what you want to implement and what you don't want, as you would between separate content releases, or other projects, unless you know exactly what resources affect what you like and maybe know how to merge/modify them to your needs. If you've modded other games you have an idea of how modular vs "whole" releases work.