Thanks again. I found that Wikipedia already. Wikipedia contains an awfull lot of information when you start studying these things IMHO.
I have no real problem entering umläute and the like (in dutch also several of these diacriticals are used) using Shift-RightCtrl as a key that makes then pre-typing of one of these diacriticals possible. A bit tedious, but I am already used to it. Nevertheless I will try this SCIM. One can always learn something new.
