once again, trying to make stuff clear:
1. all of those firmwares you posted are no different from the genuine R4 firmware.
2. there is no bricking firmware on the R4. It's scheduled for september 15 (very soon) but I highly doubt it.
and here- try it yourself and you will finally understand.
1. go to www.google.com - remember, 2 o's not zeros between 2 g's.
2. type in windhex, not winhex. (in the search bar)
3. click on those blue (not black) hyperlinks one by one (it won't blow your fuse) and check if it has a download link for windhex
4. Click on download and save it somewhere you will remember (in your hard drive)
5. Execute the exe file in the directory you saved in
translation: double click on the icon that looks like a programmy thingy with a circle and stuff all around it in the folder that you have saved in your computer.
6. press file, then DOUBLE click on each _DS_MENU.DAT from each firmware.
7. check each hexadecimal (the numbers in the middle column) one by one with your eyes. If you see differences of more than 10 hexadecimals, tell me right away.
as you will have noticed, they are all the same!!!
go to google and type in "define: clone"
and you will see what clone means.
just because you use a firmware of a clone doesn't mean it won't brick your R4.
THERE IS NO FIRMWARE THAT WILL BRICK YOUR R4.