It seems that I can't use standard GNU Grub to boot fiasco directly, since there're several commands not recognized by standard Grub such as "modaddr", "vbeset" and etc.
However, I couldn't find the enhanced grub tailored for Fiasco. Following the instructions on http://os.inf.tu-dresden.de/drops/download.html, I have tried to check out the "grub" module from SVN using "$ ./repomgr co grub", but it doesn't make sense.
Could anybody tell me where to find the grub for fiasco?