Thanks J4ZZ,
i know the procedure, but if i get these lines right, we have to decompress the kernel image, put some files in it, compress it a little different, flash, tell the bootloader "hey, there's another kernel" and get it going. Very long procedure.
Well, i'm more into grub and lilo, but afaik it's quite easy to compile the kernel u-boot ready, or do I get this wrong? Could be, that this would make the kernel depend on u-boot, but I don't think this is a huge problem.
atm it's just easier to switch between v48 and the u-boot-ready v46 i think.
There will be further kernel updates and we would have to do this again and again.
I'd appreciate it, if non-geeks would be able to test meego to, write bugreports and such stuff...

Or could it be, that this u-boot or multiboot could be changed to "hey, look if there's a bootable OS on the sd card and boot it"? I did this sometimes on my laptop when I broke grub. I don't get why this is all so complicated - afaik the bootloader just points to vmlinuz and that's it - do I get this wrong?