I've developed a simple script that enables your Amiga to boot different operating systems from a single CF card.
It has been tested with Amiga OS 3.2.1, Coffin R61 and ApolloOS R9.2 but many other Amiga operating systems are possible.

The idea is to prepare a CF card with the files from all (3 in this case) systems and then use this script to boot the desired OS.
The script is short and easy to understand so that it can easily be adapted/expanded to your own needs (more/other OS's, other turbo boards, etc.)
Switching the OS can be achieved in your currently running OS by executing the script. It will move your current OS into a subdirectory and the target OS to the filesystem root (which just takes two seconds) and reboots by softkicking/mapping the target kickstart.

Requirements:
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- An Amiga or Turboboard that can softkick/map a kickstart
- a big CF card (64 GB for above-mentioned 3 operating systems)
- an experienced amiga user

Check the script and the full readme out here:
EXTERNAL LINK 
If some more people are interested I could perhaps write an install batch file for preparing the CF card, so that more novice users can use it. Comments are welcome.

PS: I am aware of ApolloBoot and I very much respect Willem Drijvers work but I wanted a simpler solution for me.

Regards,
Zodiac