I don't know what original files you used to install your V4/M4 models; I used the old execution files installed into P7 a long, long time ago. But regardless of whether you used exe or zipped files, the process is relatively the same. Both models and morph packages must be installed into the same runtime folder because they rely on DAZ's ExP system for the packages to associate and create morph channels with the models, otherwise, the morphs will not work. IIRC, the .bat files are installed at the same time as your models and are available whenever you install a morph pack. So, for every morph injection pack you install (Morph++, Aged, Muscle, Creature, etc) you must run the .bat file afterward to make the model channels active. The image below just shows the hierarchy where all the .bat files are located in relation to their corresponding folders.

If you did a typical installation from zip files then everything should work. If you installed your content into different runtimes or generated multiple installation across several runtime folders, you will have problems with morphs working properly. Now, if your OS is Win 7 or higher, don't install any content into the Poser primarily runtime folder. Windows UAC will interfere with those installations and cause morphs to misbehave.