Later on, I selected symmetry and going to the modify panel I chose Unwrap UVW, so then going to edit and selecting one part from actual model I clicked mirror so on 2D sketch the mirrored part appeared. After that was done, I positioned them together and welded middle points holding CTRL + W. In options I changed the width and heigh so the sketch elongated and resized it within the box. Then in Tools I selected render UVW template. I changed the width for 2048 and heigh for 1024 and clicked render.

I also tried normal render.

Followed Tutorial:

http://www-personal.umich.edu/~emaslows/forums/training_videos/surfacing/MAX_OMS-09_UVCoordinates_p2.mov