How can i change all the pictures to one picture?

HOW WOULD I CHANGE THE TEXTURE.. WHEN I TRY TO DO SO.. IT SHOWS ME LIKE THE GOOGLE MAPS.. AND I HAVE TO PICK A PHOTO FROM THERE....?

AND I'M KINDA ON A TIME CONSTRAINT.. I REALLY CAN'T SPEND A LOT OF TIME LEARNING THIS PROGRAM..

aNY HELP WOULD BE AWESOME... THIS IS DUE TOMORROW... =(

SORRY CAPS

I found this model of the matrix room...

I was wondering how could i change what is on the screens..?

any idea? i have jpegs... I would be more than willing to modify each pannel.. because i wan different pictures in each TV...

Its for a school Project.. Thanks!

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