I'm not sure if that was a question or a statement. Nothing to worry about, as long as you're careful. Don't delete anything without a backup copy.
If you were asking if you needed to do ShortFuse, yes. Or it won't get past the installation password. Hopefully someone (pionara) will come up with a super-easy method that won't require manual hacks.
last time I did a upgrade for my older z130 that I downloaded from this site, I just had to swap CARDinfo files. when I got the Z140 that I have now, I purchased the upgrade from Ebay and just inserted the SD card and it did the upgrade. seems like I need to wait before I screw up my unit. sorry if I wasn't clear enough