EBP 3.5: Approval of Shopping cart: More approvers, different approver finding strategy

[Christian Baessler]

Hi,
 
we are implementing EBP 3.5 and would like to change the approver strategy
and add more levels of approvers.
 
More or less: the G/L account and cost-center combination determines which
path should be used,
the amount determines the number of levels.
 
My questions:
 
a) where does the approver determination take place ? In the transaction ?
Does anybody know if there's a user exit or at which place in the code to
change the logic ? (in case the transcation is called)
 
b) How is the Workflow called, e.g. WS10000129 for one step approval. If I
switch on the event monitor, I never get an entry in there. It seems to me
that the event linkage is not used ???
 
c) The nice litte Java Applet for the approver-preview and history: what FM
does it call in the background ?
 
 
Thanks
Christian