grace notes at the same time with "normal" notes

[Stefan Thomas]

Dear Lilyponduser,
I wanted to ask, if it is possible, to start the first grace-note in
the below quoted example at the same time as the "normal" fis? And,
one mor question, is it possible to have slashes through the stems of
the grace notes?
Here ist the short example:
\score { <<
        \new Staff \relative { \grace {c16[ d e f ] }g1 }
        \new Staff \relative {fis1}
         >>
}
Thanks,
Stefan