R12.1.3 -Payables Expense Reports Projects Based

Has anyone used Payables Expense Reports (Project Related) functionality?

I am trying to figure which account generator is used for When Project Related Payables Expense Reports are entered in AP.

I am entering Standard Invoice which invokes Projects Supplier Invoice Account Generator and it works but unable to figure which account generator is invoke for Payables Expense Reports. Modified Web Expense Reports for Employee but looks like it is not getting invoked.

Thanks for your time in advance. I would appreciate any input on this topic.