WMO files does not have .skin files. They are just WMO's. WMO's have other WMO's files with numbers at the end of the file, for example Undercity.WMO have a lot of Undercity_01.WMO, Undercity_02.WMO etc.And you shall be able to see the textures fine in-game. Noggit usually is not responsible to show up objects and world objects from other patches than 3.3.5.
Noggit can't render a lot of WMOs from other expansions properly, thats true, but in most cases there are some well displayed textures and some at least look a little bit like original ones which are to be shown. When something is just white like this, it looks more like you simply don't have their textures. I personaly have both of these WMOs, use them and they show up much better in noggit than this.Its quite likely that you just don't have their textures. Have you extracted them as well?Btw, about .skins and so on, retro-porting and especially retro-porting of WMOs is not something what I would really recommend to someone who is beginner. You still might try, yep, but I am not sure how far will you get.
What is that Dungeon folder doing in WMO? If it is Dungeon/Textures/.. path with textures of WMOs, it has no business in WMO folder, it should be in root directory (on the same level like world folder)
Lets make this clear (I suppose you already know that but...):1. error cube means that model which was to be displayed could not be found. Your client's DBCs either don't contain displayID given by server, or your client's MPQs don't contain model with name and path specified in DBCs with those displayIDs.2. green texture means that texture could not be applied, which means that its either palletzized when it should not be (palletized should be only textures applied on character models), or it has wrong size (height and width should be both > 8 and in (8, 16, 24?, 32, 40?, 48?, 56?, 64...), or it simply could not be found (texture which should be on model doesn't exist in your MPQs, is in wrong directory or was renamed).So, open DBCs, open WMO's root file in 101 (or even HxD will do for this, even notepad) and start looking for problem.
--- You do have WMO ported in your client, you do NOT have its textures. ---I don't know how many times will I have to say that.