about Session method(BDC)

hiii all,

plz tell me hw to handle

!) multiple applications in SESSION method & in which cases we required it. (plz gv me step-by-step procedure to achieve it)?

2) And what is the structure of FIELD_CATALOG_MERGE?

3) can anyone tell me abt SD & MM business process flow.?

thank u in advance.

good answers will be rewarded with points

sweta