actually russian programmers made a neat little program that makes all the changes for you called Multiplay IME:

1. Go to http://trashbox.ru/topics/8274/multiplay-ime-1.0 with your Opera browser of your ac100 (for some reason, Navigator doesn't want to download the file)
2. click on "Скачать Multiplay IME 1.0"
3. once installed, go to Settings - Language
4. deselect "Use Android Keyboard"
5. select "Use Multiplay IME"
6. then go to Multiplay IME settings and select default keyboard AND enabled keyboard of the language of your choice
and there you go, magic!

PS if you have installed the Honeycomb port, Multiplay IME is already in there so no need to download, just follow the steps starting from 3.