So I recently took it upon myself to answer a request and try out vertex hacking for the very first time. The request was to
turn Peach into Daisy. I've gotten pretty far in making her accurate, including making her face the correct shape.

As you can see, however, there are some gaps left under her eyes. Daisy has much larger eyes than Peach, so my original plan was to stretch those polygons that make up her eyes down, as well as a little tweak to the textures. I was pretty confident that I'd be able to close it up and leave no visible seams, until I actually attempted it. Below is the result:

Her eye explodes. I noticed that DrPanda is having what appears to be a
very similar problem; and, while I could very well find my answer over there, I decided to create this thread in the event that they aren't related.
My process for vertex hacking thus far has been to export the model and vertices, have Vertex Box create a .3ds out of them, use Anim8or to convert it into a .obj, put that into Blender for editing, export the results as a .obj, use Anim8or again to convert it back into a .3ds, and finally, insert the changes into the .mdl0. It's an arduous process, but as displayed above, it worked perfectly up until I tried changing her eyes.
My question is basically this: Are Peach's eyes, like Toon Link's hat, unable to be vertex hacked at this time, is this a problem with the fact that I'm attempting to put a vertex hack on top of a vertex hack—even though I'm modifying a different set of vertices—or is it something else entirely? Any assistance will be very much appreciated. Thank you.