Sadly texturing a land takes a more artistic and creative mind. For me it takes a long time and several attempts to get a land to look the way I want, even then I'm not always happy with my work, I can always think of something that could look better. I normally look at other lands and study they way they had textured their lands, the textures they used and the layer's properties, even the colours they used for each texture. Then I would replicate that on my land.
If you want to see another tutorial for texturing:
http://www.bwfiles.com/archives/ModdingWiki/wiki.planetblackandwhite.gamespy.com/PBnWModdingWIKI/index.php/Black_%26_White_2_Mapping_Tutorials.html
It would be helpful for me if your two images worked.