DabombberYou'll need to replace the vmt/vtf files in %steam_user_dir%\Team Fortress 2\tf2\custom\HUDASIscariote\materials\console instead of the default ones.
That was the first thing i tried, however, there were a few problems. 1, The names of the files in the download are different to the ones in the hud; 2, i have tried renaming them, but i coudn't tell whether some were widescreen, or if they are diffrent,
I highly recommend trying it yourself and seeing if you can make sence of it.
http://tf2.gamebanana.com/guis/16565
EDIT: I manged to get it to work (by renaming the files), but the color is negative :(
EDIT2: The Negativity's gone, but now it's showing up random backgrounds from the game