Simple Glass Settings

This image shows some basic glass setting and some textures to use to get a reasonable distortion effect. The textures to the right are the specular and environment maps, they are custom textures so you wont find them in your files but similar textures would be quite easy to make. The diffuse texture is just plain white plain white. The plastic bump map is a standard texture and is scaled to produce a warped reflection. A better environment map will give the glass reflections from the scene but the above settings should serve as a starting point to experiment further.