Okay, now i got it working. Some problems still persist, which is:
Calibre starts several threads to download a recipe. This is very nice if you do not have to worry about RAM because it speeds everything up, but i do have to (only 128MB, slow swap on USB-Flash). It effectively slows down the process enormously (takes about 20 minutes for some daily news). Is it possible to tell calibre not to use so many threads? One would be enough in this case, then RAM would suffice (and speed everything up

).
Thanks,
Lena
EDIT: I found a setting within the desktop version which affects it - but i do not have a GUI on the device. Where can I find the setting, using command-line tools?