Soviet:
It has been submitted to HTC to be a MA terrain. Hopefully you'll be able to fly it when 1.10 comes out.
Cajun:
I did those tiles using Adobe Photoshop. They're nothing fancy but adequate. AKNuttz is the acknowledged expert on texture tile making. I bet if you begged him real nice over on the Terrain Editor Forum or promised to get him drunk at the CON he might post some tutorials on texture making.
Regards,
Wab