How to access the remaining space on iPXE CD/floppy images

[robinsmidsrod]

What kind of file is this "boot script file"? Is it an iPXE script, or some kind of binary? Since you mentioned "access from embedded script", I'm guessing that you might be referring to a binary of some sort. Maybe you should step back and try to explain a bit more what you're trying to do.

If you just want to put something extra on the disks, I believe you can alter the ISO build method inside the makefile to bundle up your files during the ISO creation step. But I don't know how they would be made available to the booting iPXE instance.