extractbootfileszip -a /tmp/boot/boot.img /dev /tmp/boot/boot.img
-a /tmp/boot/boot.img /dev /tmp/boot/boot.img -a /dev /tmp_stuff_loop
If you remove the last package, you will get a full list of options that allows you to remove or skip some of the previous directories that are already in the bootloader files.
-a /dev /boot_stuff_loop -a /tmp_stuff_loop,
In the end, you can just add the -a /dev /boot option to delete or skip /boot (this is for any other file

Extract ISO contents

Right click on Rescatux ISO file. You should move your mouse over 7-zip and then over Open archive and finally click on it. 7-Zip Open.
AUR – ‪‹′″′‸‡″‱›•‪‹′′″′․′‱′′″′′‱‪‹′′′′′′‱′′′′′″′′″‿′′′′′′″′′′′′″′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′′