wget http://dl.opticaldelusion.org/sbf_flash
chmod +x sbf_flash
./sbf_flash filename.sbf

Thats it! FTW. LOL ..

Well, a bit --verbose look here [1] and here [2].

[1] http://www.nodch.de/howto-sbf-files-unter-linux-flashen/2204 (German)
[2] http://blog.opticaldelusion.org/2010/05/sbfflash.html

now, profit!