How do i make my own minimap and loadingscreen???

You took your time, didn' t you... But don' t worry, professionnals are made for helping those who have troubles. When creating your loading scree, don' t forget to crop your parts after doing "Edit->Cut-Leave Selection", or you will have the image of about the same size, and with a little part of the image circled by black... For minimap, you should have a 126x126 or 258x258 pixels image exactly, then import it on your editor, name it War3MapPreview.Tga (must be in .Tga or it won' t work), and don' t forget to remove the "See minimap icon" on the W-E.
Enjoy!