Ok, that's what I already tried! The problem comes with the actual copy command.. I first used "cp -a".. It didn't work. Not all files were copied.. I tried your "cp -dRp" and it didn't work either! There are some files that just won't get copied! I tried to boot Knoppix without persistent home, then mout knoppix.img in some dir, new_knoppix.img in another dir... but I can't copy (all) the files from one dir to another! And those are just normal files! That's strange...
Any ideas?!..

PX.