Glissandi as "slides" in vocal music

[Stephen]

I am searching your archives and pages for the equivalent of slides in vocal 
music.

The appearance of a slide is a short glissando beginning (or ending) at a note 
head.  I have a SATB two-staff score with several slides and am wondering if 
there is any way to coerce these out of the glissando and scripts.  The 
problems here are two-fold: (1) I need to have the ability to begin (end) the 
glissando on a note without a visible end (begin) note, and (2) I need to be 
able to put multiple glissandi slides on the notes of a chord.

Where should I be looking for a solution?