The issue with the Hello Nurse model was really simple. You didn't include the eyes when you exported the model from Blender. Exporting it to PMX with MMD_Tools fixed it no issues. The bones are still going to be an issue, because all of the bones are set to Move when they shouldn't.
As far as the Minnie Mouse model, the Blend file you gave me has no shape keys, meaning no facials. You would need to create the facials on your own. The model has face in its bones which allows the expression to be changed using those bones, however. It is possible to use the bones in her face to make the shape keys in Blender, as you can see here: blender.stackexchange.com/ques…
I never use the UV editor in PMX because using it in Blender is so much easier and nicer. I do believe it's possible that you need to redo the UV map for both Minnie and Hello Nurse's eyes.
Part of the reason that these models may crash PMX Editor for you is because they are really big. The Ver2 Hatsune Miku that comes with MMD has 22,961 faces. A pretty complex model like Tda式改変唄音ウタ・デフォ服 only has 43,913 faces. The Hello Nurse model has 162,088 faces. I had no issues, but I'm not using a notebook.
I'd love to write an article for LearnMMD to answer every question you have with pictures, but first I'll need to know where you got the models from so that they can be credited properly, and I'll need you to take some time to think of every single question you might need answered.
Sorry for the delay - I had to wait until I had the bandwidth to download the models.