Or you could use AutoIT scripts to do this (compiled). There's a lot of usefull aplications written in AutoIt (it's like a basic language). Try a Google for AutoIT.
I try too with a hexa editor but.....nothing. Why should be so hard to change an ordinary text / colour when are so many ways to change advanced dll's ?
I try to find how can i change the color / background of text based mode (initial setup of xp) but i don't know how can this be done.Even hexedited. Can some one help on this ?