Sorry Gwaant but it just doesn't do it for me.
I can't open the flasher via the terminal. If I double click the flasher it opens a terminal window but when I enter either command
"hmod a+x flasher.macosx" or
"./flasher.macosx -F Nokia_770_0.2005.45-8.bin -f -R"
I get the "No such file or directory" message and that's about it

Thanks