Hi scoky!
Thanks for the infos you provided.
This gave me a starting point to try out some minor modifications. I played around a bit, using a Hex-Editor, and here are my results.
And I must say, now my dictionaries are even more accessible on my Kobo HD. This is a very useful little tweak for those of us who often read foreign texts IMHO. I'm loving it.
Note: There's no color on the Kobo display of course, unfortunately.