MyBB Community Forums

Hello well after i got to make my forums wider well the images like the nav bar/banner/and fotter image. is to small so i was wanting to know how i could make them bigger to be the same width of the forums

http://auscoons-world.cxr.cc/forums

Just just change the dimentions of the images in the HTML of the PHP files, like this: width="100" hight="100"