I send a new version of my patch. I added parttype and hide/unhide commands.
Can someone have a look at it?
(I haven't tested it a lot but it works fine for me )
                                                                        
Vladimir

2005-08-02  Vladimir Serbinenko <phcoder@gmail.com>

    Sendkey, activate and parttype modules(pc) and preboots
   
    * commands/boot.c: Added support for preboot functions
    * conf/i386.rmk (sendkey): new module
    (activate): Likewise
    (parttype): Likewise
    * commands/i386/pc/sendkey.c: New file
    * commands/i386/pc/parttype.c: Likewise
    * commands/i386/pc/activate.c: Likewise
    * kern/misc.c (grub_split_cmdline): more bash-like quotes and
    doublequotes handle
    * include/grub/normal.h: new headers and types for preboots