Workflow for Approving to Post Parked Documents

[Ulagapiragasam Vanathy (RBAU/ISY)]

Has any one used the standard workflow (ws10000055) or implemented workflow
for
approving Parked documents to be posted. I am bit lost here and need help.
 
Where should I define the approval hierarchy?,  for example:
 
If Park Doc. cost centre = xxxx & amount = 500.00 go to X
If Park Doc. cost centre = xxxx & amount = 1000.00 go to X and then to Y.
 
In Financial accounting configuration menu I couldn't Do this under
" Assign Release approval procedure for release for payment".
 
Greatly appreciate any kind of hint or help.
 
Thanks
Vanathy