Lilypond questions

[Simon Adda-Reyss]

Hi, everybody. I'd like to ask you two questions about lilypond (I'm using
version 1.4.2, debian potato).

- Is there a way to print what I would call a "trill spanner", a sort
of line after the \trill command that could last for more than a note? 
        Ex: c4\trill(the command would start here) d2(and continue here)

- How can I put a grace note AFTER a note? I tried:
        a4\trill \grace{[bis16 cis]} s16    It didn't work correctly.
        I tried to attach the grace note in a chord <>, it was ugly.



Please help me. Many thanks!


Simon Adda-Reyss