Hi Gui,
There are other SAP solutions as well that do not offer sales samples functionality, but there are workarounds. They might give you some good ideas of how to do a workaround in ByDesign.
Please have a look at this non-ByD post: http://scn.sap.com/thread/864075
Hope this helps.
Kind regards,
Douglas Kisinger Thompson
Support by SAP Cloud KM