Found my three books in my mailbox yesterday, fast delivery
Too bad neither Mobipocket-creator nor the Mobiperl-tools from Tompe (found in this forum) could make anything useful out of the HTML-file.
It crashes the mobipocket-reader (both on my Cybook and on my PC) in plain HTML as well as converted to mobi.
Maybe I'll try to save the RTF-file as a .DOC and the import it into mobipocket-creator. Otherwise I'll have to do with plain text on my cybook