Making System into .ISO

Here's a question of a different variety.  I spend enough time configuring Arch to my liking where I don't want to do it all again if I mess something up, or if an update breaks something.  I want to put my existing system in an .iso, and use that .iso to put it back when I need.  Is this even possible?  If so, can someone give me some detailed instructions?

I have not installed via Larch but the mechanism is part of the LiveCD/DVD.  I have made several cd and dvd versions and also prepared a flash device which will boot from USB-HDD.
Larch also provides for copy-to-ram.
The CD/DVD will load the system you provide and can be larger than CD 700MB limits when using DVD media.  It cannot be upgraded except during a given boot-up; however, if one uses USB flash, the upgrades can be retained therein and be reloaded after the next boot-up.  Also, if one has rewriteable media rom devices for multi-session, this  feature is also provided with the Larch scripts.
I use flash devices to retain upgrade data which I install with pacman.  When items are installed via pacman, they are r/w because the aufs is employed to install them in an overlay.  Thus any package originally loaded as r/o can be upgraded to r/w
One can utilize the flash device to load all upgrades or only those desired for the activity to be pursued.  Then they can be removed via pacman if desired.  This is desireable when running in copy-to-ram in order to maintain ram use to useable limits...memory management by the user.
This use of USB flash makes the Larch very versatile especially if operating in ram although I understand that Larch does very well when booted from flash (systems with USB-HDD boot) and operated from flash.
Running in flash will end up in a crash when the flash is degenerated enough, it has a lifetime.  I have expectastions that hafnium chips may extend the lifetime by a factor of ten for flash devices.
I have my system with 3GB ram that can run 24/7 in ram...it has one drawback, my mobo doesn't have USB-HDD boot so I have to keep the CDROM available in the machine.  Everything else is USB capable.
I digressed from the question you posed in order to outline the full picture provided by Larch such that you can determine whether it meets your need.
Best of arch to you!

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