Unique Memory Initialization Files for Multiple Nios Instances

Your last summary of my intent is correct. I would like to run different applications on two (or more) Nios processors where each processor is an instance of the same Nios design. This way I have only one Qsys project and one BSP.

How do I assign a unique memory initialization file (containing the application ) to each Nios instance?

// Verilog example. One Nios design ("nios_cpu") instantiated twice, with each instance running a unique application (how do I assign the .hex file to each?):

nios_cpu cpu0 (...); // this one should use cpu0_mem_init.hex (how do I assign this?)

nios_cpu cpu1 (...); // this one should use cpu1_mem_init.hex (how do I assign this?)

Thanks.