You were right, that was exactly what I was looking for.
Unfortunately, the instructions did not work for me. I did everything as explained, except that I set “tce=…” and “restore=…” beforehand in my Grub2 config file, so that “tce-setdrive” told me everything was already done, and “backup” told me setup was already done and asked me if I wanted to backup now, to which I answered yes.
When following the exact “import” commands given in the README file (for flwm_topside), the boot process proceeded apparently as expected, but was actually stuck to an endlessly swirling slash, while supposedly loading extensions. I was however able to type Alt+SysRq+E, which left me on TC prompt: there, “mount” told me that no extension was mounted, and /tmp/tcloop was indeed empty.
I also tried with my useless “kmap=…” removed, as well as the “loglevel=3” taken from Isolinux config in the ISO file.
This was in VirtualBox, and then on a real laptop with the same results.
I then started anew, this time import-ing -b xorg-all, and then import -b -f a single file with Xprogs, flwm_topside and wbar in it. This time, the loading of extensions ended correctly (I suppose) but I received this endlessly repeated message (and no prompt):
can't run '/sbin/getty': No such file or directory
For your information, my bootloader is Grub2, and dCore.gz and vmlinuz were taken from the ISO file for RC3.