Cyclone IV and Nios II Firmware Update

Here is another question:

I am writing the complete concatenated bin-file in to the flash with one single flash write function. That means that the hardware and the software firmwares are actually placed one after the another irrespective of the "Blocks" in the flash. Do I need to worry about this??

I mean, should I first write the hardware firmware and if it ends in the middle of a flash block, then start writing the software firmware in the next block??

I would like to thank all of you for your previous answers..