I decided to try them out yesterday and printed them. Its much easier than I thought, all I did was just simply print the image at the exact size of the image without making any changes or anything. I cut them out and they turned out great, that was with plain paper and normal print settings too so nothing special for it as it was just to test them out. After cutting them out I placed them on the newsman TV wall thing and I thought I would need glue or tape or something but they actually fit perfectly into the sections without anything there to hold them in and they dont fall out of anything because its quite a tight fit. I had to trim some of the edges though.
I might try and print these at the best print quality and on glossy photo paper so they look shiny like real tv screens. My printer is pretty old and not very good and the prints came out so well so I highly recomend this to anyone who has a printer as I'm sure everyone else has a better one than me.