Hi Bastler (wie passend ;-) - you should search a bit more careful.
There is already an other thread here http://talk.maemo.org/showthread.php?t=34972
and even a bug here https://bugs.maemo.org/show_bug.cgi?id=5793 concerning the fact of having only two profiles and [UPDATE] a nice garage app (Tweakr) you might like to test here http://talk.maemo.org/showthread.php?t=38009