customize number of input fields on nodereferance autocomplete widget

I was thinking of using node reference for a music setlist system where each setlist would reference the actual songs played, which would be there own nodes. Node Reference is the perfect module for this (thanks!) but has one drawback: it only lets you put in three nodes at a time. This obviously makes data entry tedious. The fix for me was easy, all I have to do is edit the line below, replacing "2" with "20" (line 261):

foreach (range($delta, $delta + 2) as $delta) {

However, a better solution would be a configuration option that would appear if you select "multiple values" that asks you how many empty lines you want by default. I think that this is a reasonable request considering the varied use of this functionality.

Thanks
Rick