modifying advanced bootcopier ,booting from EPCS

Background:

I am developing a project with two separate boot images building from two application software. The two images are stored in EPCS64, I need to boot one image from the EPCS64 at the designated address.

I use Quartus 12.0,Sopc builder configure my FPGA hardware system.

I have read the technology document "Alternative Nios II Boot Methods " and download the example.

Desired solution:

How can I modify the example to build my own advanced bootcopier with command shell?

Are there any documents about this?

How do I compile the bootcopier_bsp_settings.tcl ?

Thank you very much!