Is it possible to have the texture(skin) on the model in the editor?
Textures in the (standard) mpq's are found automatically. If you have a texture "MyFolder\MyTexture.blp" then it has to be located relative where the program is (like C:\War3ModelEditor\MyFolder\MyTexture.blp) or relative to where you opened the model (like C:\MyModels\MyFolder\MyTexture.blp).
are there any other/better ways to place bones
Disturbing, how I just one a simple rotation, and it's so difficult
Sorry. Good pick/drag-n-drop features are hard to implement. There is a reason why good modelling programs costs 999999$