1) Formatted paritions. I doubt you want to undo this.
2) Created mount points. Ditto.
3) Update /etc/fstab so that you can 'mount -n -r /programs0' etc. Again, it sounds like to need to keep this.
4) Created 2 utilities 'rop' and 'rwp' so that you can easily re-mount the new partitions read-only or read-write. These are in /bin. You can remove them if you want, but then you will need to manually remount partitions for writing, and back to read-only. cat /bin/rop and cat /bin/rwp to see how.
5) Created /etc/preinit.d and populated it with scripts. If you removed the entire directory, then the new partition wont be mounted at boot, so you may want to keep the N20mount script. But you can cd /etc/preinit.d and remove the others if you so desire.

That's all.