jazz lead sheet questions

[Jason Flatley]

I am making a jazz lead sheet and I have two questions.

1)  I need the treble clef and key signature to be printed at the beginning 
of the first line, and then never again on subsequent lines.  I tried making 
the treble clefs on these lines invisible, but it left too much blank staff 
space on the left.  Also, I need these lines to begin with a barline.  Is 
this possible?

2)  Is it possible to put rehearsal marks (letters) in boxes so that the 
right edge of the box is just resting over the beginning of the staff? 
(This way, the box is almost in the margin, so doesn't conflict with the 
chord symbols).

Thank you very much.

-Jason Flatley