Many thanks, Stephen
I don't know why, but first time I have tried to flash this rom, the operation was aborted, like many of my attempts to flash any rom.
Nevertheless, I made sure to reinstall every possible drivers, especially those present in flashtool folders. Also launched flashtool in administrator mode. Plus, I did not try to drag and drop files, but insisted on flash mode. I then clicked on flash icon, selected flash mode, chose the rom with erase data. My phone connected on usb, with no battery inside. Flashtool invited me to the usual proceedings, but I simply put the battery with my finger pressed on back button. When I saw the progress bar with percentage, I was filled with happiness. You made my day :fingers-crossed:
Don't know why any other rom could not flash, especially 2.3.3 stock. I don't care now. I'm on 2.1 though, so I'll go through the whole process towards a custom 2.3 rom. maybe another Fera
Thanks again !