Write in ext flash the fpga .sof + NIOS .elf with maxII conf. contr. + PLF

I have been used to store FPGA .sof configuration file + NIOS hex code into a serial conf device (EPCS64) using the NIOS-IDE flash programmer. Now I have a stratix III dev board on which a MAXII device is acting as a configuration controller. I have been application note 386 on how to use the PFL but have not yet found a clear set of instructions or an example, better yet, on how to use the PFL to store both the .sof and the.hex in flash ( along with the boot loader code) in such a way that the MAXII would properly configure the FPGA upon restart.

Information is needed on:

- source code for the MAX controller

- where does the MAX II config controller look for the start of a new custom configuration

- how can I add the bootloader code in flash to copy the NIOS executable in RAM upon start

thank You for your attention already and in advance for any useful hint.