I read the recent dialogue between Kevin and Patrick but soon found out that his solution does not work for me. Pressing [Alt Gr] + <something> works for some keys. But pressing it with [E] produces ¤, which is fine, but I also have to write accented characters from time to time.

After much probing I found a way that worked (at least on my machine, german keyboard without windows-key): Press Shift, then AltGr (not the other way round), then the special key '`" (<-key for ^) and then the vowel (unpress Shift/AltGr if you want lowercase). Holger.