Hello its me again

to replace my matrix with a terrain I thought I use Blitzwerk terrain. Now I got some problems with the textures.
1. I use a 1024x1024 terrain and a texture with the same size. what can I make that the texture is not looking so stretched?
Idea: I place 4 256x256 terrains and make the endings looks the same so everyone think it is one big terrain. But I am hoping there is a another solution.
2. Is there a way to add some more textures?
Thank you for helping
System: Win 8.1 64 / Core i5 (3,9GHz), GeForce 760 GTX 192 - Bit Dx 11 (Driver 335.23) / 8GB Ram