dordale and Ankh,
Thanks for the replies. I'll give it a try.
From the looks of it I think I might need several tries
EDIT: In the mean time I tried the "font on reader" method and guess what? It worked with the first try
I had been reading the whole calibre Epub thread and came across quite some of this (css) coding but somehow I missed out on Zelda's simple 7 step cookbook recipy. Also llasram has described it. Credits to them and thanks (again) to dordale and Ankh for pointing me there.