You encode your poserised bike using the original bike object as the seed. RTEncoder allows you to encode using almost anything as the encoder object (you have to select 'all files' in the Key Files, Files of Type dialog box), so if you use the unzipped bike object from the 3D cafe to RTEncode your version, then people could only use your version by un-encoding using the same unzipped bike object downloaded from 3D Cafe. Make a note in a readme about the 3DCafe bike required for decoding (a link that could be copy/pasted to download the bike for example), and hopefully Bob's your uncle! Tell you what, try the encoding, and let me try decoding it to see if it works. You can send the RTE file to me at nightraven_uk@yahoo.co.uk if you want.