Hi man, i was a bit bussy, but yes probably thats because the entire layout was designed for a 16:9 resolution, so when i upscale it to 4:3 resolutions it'll probably looks stretched, i'll try to change the method used for the scale, perhaps instead of resizing the image it'll be better to work with the percentage of scren occupied by the images and scale that percentage, just a thinking.
The problem with that are the static images, but let me see what i can i do.