Hi,

I highly recommend this wiki. Read that through then perform the reflash.

Btw. I'm not able to check your links now so I do not know how trusted it is as for maemo OS image files; here is another trusted one.

From the wiki: "When flashing the eMMC content, the safe way is flash the eMMC/VANILLA image first, then remove battery for a moment, and then flash the FIASCO/Rootfs image. Do not boot up the device between the two i.e do NOT use the -R parameter at the end!".

It is a safe way, I've done it sooooo many times

When reflash is done then you can install CSSU.