For a very good tutorial on using BINedit to build track props, visit Phineus' BINedit Manual at The MTMG.
Or, you can check out my new site, The BINedit Resource, which deals with using BINedit both for building MTM2 trucks and in general.
Finally, the address for Oliver Pieper's own site is http://www.viaregio.de/pieper/. He has given his BINedit program a new home here and posted a lot of technical information about it and about the .BIN model format, but please note that OP no longer supports the program due to lack of time and interest.