PCIe Avalon ST Multifunction Simulation

Does any one used Altera Avalon ST Multifunction design, if so need help, in simulating the design.

The design example as well testbench support from altera is default for only single function.

Need to know, what all modifications to be done to the BFM part to support for the Multifunction.

Like Bar table Pointer control for different functions, Bar space allocation...

Thanks