Looks like a good thing to do Nemka, but I notice that your zip file includes a boot.img file configured with a 4k page size.
As I mentioned in another post (viewtopic.php?f=10&t=1218 - but no-one has responded ) the Scrolls which have a 1.02s firmware seem to be using Samsung 8k paged NAND chips and so their boot/recovery images use 8k pagesize (Maybe the s in 1.02s is for Samsung?). I don't know what would happen if you loaded an image with the wrong page size, but I don't want to be the one who finds out!
What is the firmware in your Scroll?
Eddie