I want to modify Account->Suppliers->Suppliers Invoice workflow (account.invoice.basic) from workflow wizzard. I want to put a button "stock" before open button. Stock button I want to open form from Purchases-> Incoming Products -> Incoming Shipments to add products in stock before I sell. I go in Settings -> Tehnical -> Workflows -> Workflows and I modify account.invoice.basic workflow. I try a lots a combinations but doesn't work. How can I do that modifications. (I search on google and youtube but I dont find a good material for working with workflows in openerp 7.