Hi Frank
 A short but extensive recipe was given to me by Mike Fabian. For the sake of simplicity and in order to avoid any mistyping from my side his original wording in German can be found in the attachment.ごめんあさいfor breaking the rule of everything to be in English.
I might add from my experience: Despite everything works fine with KMail which will give you "overthe spot" expressions during the writing process, I personally prefer "on the spot" writing which you get without any additional settings just by using Mozilla. However so far I cannot print jap. mail with Mozilla, which gives me nice empty squares instead of Kanji. I have found a workaround but this does not seem to be such a hard problem and somebody will surely have a solution, which I also would be interested in.
Good Luck
Walter.