codeMonkey - My congratulations, welcome to the club! I hope you'll find the firmware good enough (anyway, there is no known way back, as you remember).
Cyberman tM - I had to add that note about bricking possibility just because some people cannot follow instructions. The two cool-ers i saw turned into pосketbooks survived the operation all right, with no bricking.
However, I did not know that there were as EB600EM, so EB600E Cool-er models.
Nonetheless, it may be interesting for you to have a look at ShineBook firmware, too: http://shinebook.eu/scripts/Shineboo...7-20101123.rar
It has a German dictionary installed (booq has Spanish). The dictionaries seem to be not replaceable. I used to install that version with no problem at all. I made sure that it could be replaced with booq or cool-er firmware if you do not like it. Still, all the risks are yours.