[Question] Undead to Human, is there a problem?

[dingselbums]

Hello.
I wanted to look my undeads more like human, but still undead.
There I found some human textures that I wanted to use:

mmowned.com/forums/model-editing/54691-new-caracter-skins-loading-screens-more-d.html

I tried it on myself with this guide:

mmowned.com/forums/model-editing-guides-programs/64112-guide-how-change-your-race-into-another.html

But what I got was this:

img99.imageshack.us/my.php?image=wowscrnshot121107010041hp4.jpg

I tried it again but it was the same.
After this I looked through the forum searching after an "undead male to human male" conversion because I thought: If I get such a conversion, I just have to replace the textures. But there weren't any "undead male to human male" conversions. Only requests.
Is there a problem that makes this conversion impossibel or difficult? Or is it my fault?
I think it is something with the face of the undeads. This option where you can change the lower jaw and so on.
Please, can somebody help me with this problem?

[Pullefjun]

When you extract all the Character folders, in your Character\Human\
there should be alot of .blp files and two folders with the names Female
and Male.
Did you bring all of these .blp files to your new char folder? If they are
not included alot of facial texture dissapear, if u have moved this there
is no guide availble to fix it either I think :/

[dingselbums]

When you extract all the Character folders, in your CharacterHuman
there should be alot of .blp files and two folders with the names Female
and Male.
Did you bring all of these .blp files to your new char folder? If they are
not included alot of facial texture dissapear, if u have moved this there
is no guide availble to fix it either I think :/

First I moved all original human .blp files and then I replaced them with the human deathknight .blp files, because I thought maybe there aren't all needed textures in the human deathknight included.
A few minutes ago I tried it a third time, but it failed, too. I noticed that the chin beard appears , if the lower jaw isn't changed. Not the texture but the model.
Edit:
I changed the .m2 files from patch.mpq to the ones from common.mpq. It works a little better now, but the holes are still there and there are still problems with the chin beard texture: sometimes it's there, sometimes not. Now the females have the beard textures too. >.<
I saw that there is only one human deathknight skin: one for males, one for females. Too bad. Before I changed the .m2 file only the deathknight skin and the undead skins were shown. Now, after I changed it, the deathknight and the normal human skins are shown.
Because of this, I think I'll give it up. I can't create new textures, I think that is very difficult. But I still want to know where the problem is.