BCP doesn't support the format in question (which I'm guessing may be proprietary to DB2 or some other package). In any case, BCP is purely a DATA copying facility (no meta-data). You can have Sybase Central dump the DDL for your DB so you can run that against DB2 and then load the data.
Years ago, I was involved in creating a utility that did something like what you have in mind. If you'd be interested in some suggestions about how to implement it (in say Java), contact me directly.
HTH,
John
nsjmcraig@netscape.net