Hi,
You must try the new version of TDMS BPL with TDMS 4.0.
We've very friendly model designer named BPL Modeler. You can view the details of standard BPL objects and you've the option of creating new BPL objects as well copying and extending the standard BPL object.
You can find the documentation regarding BPL in the guide
"SAP TDMS 4.0: How to transfer Business Process Library" at below link
https://websmp104.sap-ag.de/tdms
In case you have any specific question, please post here...
Regards,
Rupam