Model Viewer crashes

[Nuclearbones]

I made a landscape in blender, I have it textured with the UV editor all set up and everything. But for some reason it keeps on crashing the model viewer. (I'm using this landscape to create a VERY large map)
I even read this article here just so you know, before anybody links me to it:
http://wiki.frictionalgames.com/hpl2/thi...[]=blender

Is it because my model is too big? I mean, it IS 16 x 16 blender units.
I'll post screenshots below, but they'll be in .zip files. Too much of a hassle to put them all on deviantart.

And if anybody wants to look at either the .blend file or the .dae file, it'll also be in there.

EDIT: Updated the Zip to show that I do have textures and materials.

I know I also said that I'm dropping the project. Not now, no. I'll drop it when either the two months are up or until I finish up doing all I can do.