I finally have my Apple //e booting from my SCSI2SD but I'm missing something regarding how ProDOS knows what program to 'startup' when it boots.  As I understand it, ProDOS will look for the first .SYSTEM file and launch that, which seems simple enough.  But what if you want to change a bad decision you made months ago?  In my case, I was working from the newly released ProDOS 2.4.2 and copied over the files PRODOS and BASIC.SYSTEM (and sure enough, I wind up at the basic prompt when I boot).   But the Floppy disk I was working from seems to have QUIT.SYSTEM as the first system file, and _that_ disk boots into BITSY.BOOT - so I have to suppose that QUIT.SYSTEM is redirecting the boot loader somehow.  If I wanted to change my existing ProDOS disk to stop loading into BASIC.SYSTEM and instead load into BITSY.BOOT how would I move the QUIT.SYSTEM to appear _before_ the existing BASIC.SYSTEM?  How does a user manipulate the order of the files to change which SYSTEM file you want to currently use?  I would be astounded if the answer is to "delete everything and add files in the correct order" - I feel like I am missing something fundamental, but snooping around the web hasn't exactly been very informative.  Would someone kindly kickstart my brain please?