Easiest thing to do with your station logos is open them up in Windows paint, and then "save as" a 256 color (color is just fine even for a 5000i) .bmp file. Select this in the window at the bottom of the save as screen. You can also resize them using paint.
Within Touch Screen setup, click on the button where you want the logo, select the icons tab, right click, and select load. Find the icon from where you saved it on your harddrive. You should probably load the icons onto both the active selected and active unselected slots.
Jim L