couple of questions

[Philip Nelson]

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Hey all, I'm fairly new to lilypond, but I've got a couple of small problems. 
I've attached my .ly files so it's easier to describe them.

In bar 69, where there's a trill on an E, I would like to have the "arco" 
markup below, but then it gets written on top of the 'p' dynamic marking. I 
would also like the natural sign, which at the moment is above the other 
markings, to be beside the trill marking, to indicate to trill on an f 
natural. Is this possible?

Then, on bar 72, I would like to a slur which starts on the e in 72 and 
encompasses both the d sharp and e grace notes (ending on the e), but I can't 
figure out how to do this.

Help much appreciated

Thanks a lot,
Philip Nelson
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